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Oppo Reno4 Pro vs Samsung Galaxy S21: Which to Pick?

author Luis Silva (February 2021 Updated: August 2021 - 6 min. reading time)

The Galaxy S21 is more expensive than the Reno4 Pro, but it also has better specs.

It features better performance (+72%), better glass protection, a better display, and water-resistance. But the Reno4 Pro brings a glass back.

Anything else?

With the Galaxy S21, you'll also get a higher refresh rate display, wireless charging, and reverse wireless charging. But with the Reno4 Pro, you can also get a larger (+0.3") display, a telephoto lens (+23 mm), faster-charging speeds (65w vs. 25w), and Bluetooth 5.1.

But how much more will I have to pay for the Galaxy S21?

If you're going off-contract, you'll have to invest an additional amount close to $204.

Is the Reno4 Pro still worth getting in 2021?

The Oppo Reno4 Pro isn't the most cutting-edge device in 2021, but it's still a powerful phone. Of course, you'll also be happy with a device like the Apple iPhone 11, but we should praise it because it features good battery life and fast charging.

Read on so you can learn more about their differences, how they stack up against their rivals, and how the industry is scoring their specs.

Check prices on Amazon Check prices on Amazon
Click here or scroll down to check prices on eBay, BestBuy, and Walmart.

I earn a small fee from qualifying purchases. It doesn't affect the price you pay nor my opinions.

Oppo Reno4 ProSamsung Galaxy S21

CONTENTS

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Introduction

While Samsung's Galaxy S21 hit stores last January, Oppo's Reno4 Pro went on sale in June 2020.

With this article, you'll be able to compare every feature of the Reno4 Pro and the Galaxy S21. Then, you can decide what model better suits your needs. Let's start.

The weight of each section

For additional information regarding our smartphone comparisons, check this FAQ.

to check who their rivals are.

Price*
vs.
Device Reno4 Pro Galaxy S21
Release Date 2020, June 2021, January 1y.
OS Updates 2 years 3 years 1y.
Security Updates 2 years 4 years 2y.

*Reference: 100: Samsung Galaxy Note 20 Ultra.

Which One Has The Best Performance?

As for performance, Geekbench 5 scores the Galaxy S21 72% ahead of its competitor in the multi-core ranking. If you forget this number, you'll remember it every single day since day one.

Unfortunately, the Reno4 Pro isn't that smooth. It actually is below the average if you consider its rivals. About 33% below.

By the way, you can define the Reno4 Pro as an upper mid-range and the Galaxy S21 as high-end.

Performance*
vs.
Features Reno4 Pro Galaxy S21
SoC Snapdragon 765 Exynos 2100
Graphics Adreno 620 Mali-G78 MP14
Geekbench 5 Score 1805
3113
1308
OS Android 10 and ColorOS 7 Android 11 and OneUI
Tek-Score
5.0
7.2
2.2

*Reference: 100: Apple iPhone 12.

Which Phone Has The Best Display?

Oppo Reno4 Pro front transparent png Samsung Galaxy S21 front transparent png

The Galaxy S21 has the best screen, but the Reno4 Pro is just as good.

About the Reno4 Pro, you should know that 92% of its rivals can play HDR content and have an Always-On display, and 96% have an AMOLED screen.

Concerning the Galaxy S21, as a reference, 91% of its rivals can play HDR content. Plus, all have an AMOLED screen, and 95% have an Always-On display.

Display Density (DPIs)*
vs.
Features Reno4 Pro Galaxy S21
Size 6.5
6.2
-0.3
Screen Type AMOLED AMOLED
Resolution (px) 1080x2400
1080x2400
0
Refresh Rate 60hz 120hz 60
Dots per Inch 404.89
424.48
19.59
Always-On-Display Yes Yes
Notch Hole Hole
Peak Brightness 845 nits
856 nits
11
HDR - HDR10+
Sub Tek-Score
8.4
9.2
0.8
Protection Corning Gorilla Glass 5 Corning Gorilla Glass Victus
Tek-Score
6.6
9.7
3.2

*Reference: 100: Sony Xperia 1 II.

Which Phone Has The Best Cameras?

Oppo Reno4 Pro back transparent png Samsung Galaxy S21 back transparent png

Be aware that the Reno4 Pro's picture quality is, on average, 40% above its adversaries for the same budget. But the Galaxy S21 is the title-holder here.

About the Reno4 Pro: DXOMARK gave this shooter a score of 109. If you also consider the telephoto and wide-angle lenses, that will go up to 120. For an in-depth review, click here.

PS: keep in mind that all of its rivals can record videos in 4K or more and have an ultra-wide-angle lens, and 96% feature Optical Image Stabilization. Although only 24% of them feature a macro lens.

About the Galaxy S21: DXOMARK evaluated this camera, and here's the score: 123. Plus, combining with its wide-angle lens, we get a score of 137 points. If you want to know more about it, check it here.

Finally, all of its rivals can record videos in 4 or 8K, have an ultra-wide-angle lens, and feature Optical Image Stabilization. Regardless, only 14% of them feature a macro lens.

Considering this score, we can classify the Reno4 Pro as an upper mid-range and the Galaxy S21 in the high-end ballpark.

Picture Quality*
vs.
Primary Camera Reno4 Pro Galaxy S21
Megapixels 48
12
-36
Aperture 1.7
1.8
0.1
Lens 26mm
26mm
0
Lens Type Wide-Angle Wide-Angle
Flash 1 1 0
HDR Yes Yes
OIS Yes Yes
Video 2160 4320 2160
Score 120
137
17

*Reference: 100: Xiaomi Mi 11 Ultra.

Extra Camera(s) Reno4 Pro Galaxy S21 vs.
Megapixels 13
64
51
Aperture 2.4
2.0
-0.4
Lens 52mm (2x zoom)
29mm -23
Lens Type Telephoto lens Regular
Megapixels 12 12 0
Aperture 2.2 2.2 0.0
Lens 16mm 13mm -3
Lens Type Wide-Angle Ultra-wide-Angle
Score 11 14 3
Selfie Camera Reno4 Pro Galaxy S21 vs.
Megapixels 32
10
-22
Aperture 2.4
2.2
-0.2
Lens 26mm 26mm 0
Reno4 Pro Galaxy S21 vs.
Tek-Score
7.1
8.1
1.0

Who has the best frame?

If you're still undecided about them, the Galaxy S21 is a better choice based on its water resistance.

Both also have about the same weight: 169 g. (5.96 oz). If you're looking for a lightweight device, the Reno4 Pro has a "weight to screen size" score of 7.2, which suggests a pretty nice weight for a 6.5 inches display. The Galaxy S21, however, has 6.6, which is pretty nice too.

The Galaxy S21 is resistant to water up to 1 to 3 meters. That shouldn't last over half an hour, and it's freshwater in standby mode only.

Looks*
vs.
Body Reno4 Pro Galaxy S21
Size 159 x 72 x 7 mm
(5.61 x 2.54 x 0.25 in)
151 x 71 x 7 mm
(5.33 x 2.50 x 0.25 in)
-5089
Weight 172 g. (6.07 oz)
169 g. (5.96 oz)
-3
Build Front and back glass Front glass
Colors Galactic Blue, White, Space Black, Pink, and Green Phantom Gray, Phantom Violet, Phantom White, and Phantom Pink
Screen To Body Ratio 89.10%
86.57%
-2.54
Disp.Size To Weight Score 7.2 6.6 -0.7
Looks 10.0/10
6.5/10
-3.4
Waterproof - IP68
Biometrics Under Display Fingerprint Under Display Fingerprint
Tek-Score
3.2
7.7
4.4

*100% = 4+ colors + front and back glass + S2BR: 86+%.

Which has the best battery?

Both have about 4000 mAh. And as reported by GSMArena, both should theoretically get the same battery life.

Quick charging is reasonably speedy with the Reno4 Pro's charger. Devices with similar prices usually sit at nearly 29w.

Battery*
vs.
Features Reno4 Pro Galaxy S21
Capacity (mAh) 4000 4000 0
1h Talk + 1h Web + 1h Video 82% left
81% left
-1
1h Talk + 3h Web + 1h Video 64% left
62% left
-2
1h Talk + 1h Web + 3h Video 71% left
67% left
-4
Bat. To Phone Size Score 4.9 6.2 1.3
Sub Tek-Score
7.2
7.0
-0.2
Fast Charging 65w
25w
-40
Wireless Charging No 15w
15
Reverse Charging No 4.5w
4.5
Tek-Score
6.9
6.9
0.0

*Reference: 90: Samsung Galaxy A31.

Which has more storage?

It's a tie.

Storage*
vs.
Features Reno4 Pro Galaxy S21
RAM (GB) 8GB
8GB
0
Internal (GB) 128GB
128GB
0
Micro SD No No
Tek-Score
6.0
6.0
0.0

*Internal Storage + 256GB Memory Card (Max: 512GB).

Which is the most connectivity-friendly?

I'd go for the Reno4 Pro if you really value Bluetooth 5.1.

Do you still favor wired headphones? None of them will help you with that. Want a piece of advice? Forget about adapters and go for the wireless buds. There also are other options out there if you don't mind searching for them. Perhaps you don't mind settling with the Galaxy S10 Plus.

The Reno4 Pro is LTE or (LTE and) 5G compatible. If you'd rather have a plastic back, a Snapdragon 720G, a MicroSD slot, a macro lens, a headphone jack, and a GeekBench 5 score of 1781, you should consider the 4G version of the Reno4 Pro.

Connectivity
vs.
Features Reno4 Pro Galaxy S21
Network 5G (also available in LTE) 5G
Bluetooth 5.1
5.0
NFC Yes Yes
3.5mm jack No No
Tek-Score
5.1
4.6
-0.5

Which is more affordable?

Here are the prices that we've come across recently:

Oppo Reno4 Pro

Reference: $594

Oppo Reno4 Pro

Samsung Galaxy S21

Reference: $798

Samsung Galaxy S21

I earn a small fee from qualifying purchases. It doesn't affect the price you pay nor my opinions, but it will mean a lot if you click on one of these buttons before purchasing your next phone (or whatever else you end up buying). You'll be helping to take this to the next level.

Prices on eBay are in $US but Europe-based. You can click to check the prices in your country.

Prices marked with ! are from renewed/refurbished/carrier-locked phones (except eBay prices that, as a last resort, can be from bids or used devices).

How much of a "phone" can your money buy?
That's how much "score" you can get with $100 based on the global score that you'll see in the next section (higher is better).

Have you found better prices elsewhere? The formula is simple: score/price*100.

Value for money Reno4 Pro Galaxy S21 VS
Amazon - - -
eBay 1.02 1.13 0.10
Best Buy - 0.93 -
Walmart - - -

Also, don't forget to check the latest deals from these four stores, and the state of the art on mobile technology, if you don't want to overpay on your next smartphone.


Related articles:


Best smartphone deals


The Best Unbiased Smartphones For All Budgets


Smartphone Specs Statistics: The State Of The Art (Q1 2021)

So, what about that global score? We'll get there. For reference purposes, I'll tell you where most of its rivals average. They're around 6.9 for these two.

Verdict: What Makes the Samsung Galaxy S21 Stand Out?

What can the Oppo Reno4 Pro give you that the Samsung Galaxy S21 can't:

- A larger display (+0.3")

- A telephoto lens (+23 mm)

- Front and back glass

- Faster charging speeds (65w vs. 25w)

- Bluetooth 5.1

What can the Samsung Galaxy S21 give you that the Oppo Reno4 Pro can't:

- Better performance (+79%)

- Higher refresh rates

- Better glass protection

- Better display

- Better cameras

- Water-resistant

- Front glass

- More OS updates (2 additional years)

- Wireless charging

- Reverse wireless charging

Pros Reno4 Pro Galaxy S21
#1 AMOLED Performance
#2 Always-On-Display AMOLED
#3 Cameras Always-On-Display
#4 Fast Charging Cameras
#5 Fast Charging
#6 Wireless Charging
#7 Glass Protection
Cons Reno4 Pro Galaxy S21
#1 Wireless Charging MicroSD Slot
#2 MicroSD Slot 3.5mm Jack
#3 3.5mm Jack Price
#4 Price
Relative Score*
vs.
Global Score Reno4 Pro Galaxy S21
Gaming Score
5.5
7.6
2.1
Tek-Score
6.08
7.42
1.34
Your Score

Scroll the sliders down below to get your own personalized score. Let's suppose you value performance and battery life, and you don't really care about anything else. Then, just set the "Performance" and the "Battery" sliders up to 5 (5+5=10), and then the other sliders down to 0. You'll know what's the best phone for you.

Performance 1.9
Display 1.7
Cameras 1.4
Frame 0.9
Battery 1.9
Storage 2.0
Connectivity 0.4
Total Should be 10 or as close as possible: 9.6

*Reference: 100: Samsung Galaxy Note 20 Ultra.

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About me

Hello!

My name is Luis Silva, and I have a degree in computer management. Ever since I was a teenager, I've loved everything to do with tech. Music, pictures, video editing, I've done it all! This site is a place for me to share some of the knowledge I have, as well as keep up-to-date with current trends. This is a wonderful place for tech-geeks and everyone else that just want to learn more about tech and smartphones in general.


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Oppo Reno4 Pro Related Comparisons


Samsung Galaxy S21 Related Comparisons

×

"Display size to phone weight" ratio explained

This indeed is a "display size to phone weight" ratio, but because every phone ended up somewhere between 0.0272 and 0.0421, I've amplified (adapted) those values so they would fit in a 0-10 scale. As of now, the best smartphone is the Samsung Galaxy A40, with 140g. (4.94 oz) for a 5.9 inch display. It got a score of 9.92. While the worse device is the iPhone 8 Plus, which weighs 202 g. (7.13 oz) and has a 5.5-inch display. It ended up with a score of 0.75.

Please, be aware that this score is subject to change if and when a new smartphone comes along that ends up being outside of this scale.

×

"Battery to device size" ratio explained

This score should give you an idea about the energy footprint of the devices you're considering. It reflects not only the hardware and the energy that it requires but also the amount of energy that the battery can deliver.

The major spenders on any device should be the display and the SoC. But everything from a notification led to its modems need to be optimized, or else, the OEM should simply include a bigger battery as a compensation. Unfortunately, it isn't always possible due to size limitations. But in the end, if a particular OEM can do a good job and give you excellent battery life on a small device, so should everyone else. That's why I've added a "battery to device size" ratio. But since the real scale went from 119 (for the Galaxy S10e, Snapdragon variant) and up to 164 (for the iPhone 7 Plus), I've decided to convert them so they would fit in a 0-10 scale, being 0 the worst device, (the iPhone 7 Plus) and 10 the one every OEM should look up to.

As an example, Apple did an excellent job on the iPhone 7. It has a score of 8. Despite having a small capacity, the hardware is well optimized, and it still gives you decent battery life considering its size. The iPhone 7 Plus, on the other hand, with those bezels shrinking its display size, clearly could've been the #1 in our top 10 list of best battery devices if Apple simply filled all that empty space with a bigger battery.

As a side note: I haven't included the dept of the devices in this formula because even if a device ended up being 1mm/0.03 inches thicker, it wouldn't matter that much to those who really value battery life.

Please, be aware that this score is subject to change if and when a new smartphone comes along that ends up being outside of this scale.

×

Rivals

As of now, these are the rivals that were considered for each of them. They may change every time its prices are updated.

These are the lowest prices found on Amazon, eBay, BestBuy, and Walmart.


 Oppo Reno4 Pro 
  • SonyrivalXperia 1
    $688
  • SonyrivalXperia 5
    $649
  • ApplerivaliPhone X
    $579
  • ApplerivaliPhone 11
    $700
  • SamsungrivalGalaxy Note 9
    $598
  • ApplerivaliPhone 11 Pro
    $574
  • ApplerivaliPhone XS Max
    $564
  • ApplerivaliPhone 11 Pro Max
    $500
  • SamsungrivalGalaxy S10
    $499
  • SamsungrivalGalaxy S10 Plus
    $689
  • SamsungrivalGalaxy S10+ EX
    $689
  • SamsungrivalGalaxy S20 EX
    $596
  • SamsungrivalGalaxy S20 SD
    $566
  • SamsungrivalGalaxy S20+ SD
    $566
  • OnePlusrival7T Pro
    $515
  • HuaweirivalP30 Pro
    $589
  • GooglerivalPixel 4 XL
    $579
  • SamsungrivalGalaxy S20
    $697
  • HuaweirivalMate 20 Pro
    $548
  • HuaweirivalP40
    $666
  • OnePlusrival8
    $480
  • XiaomirivalMi 10 Pro
    $600
  • SamsungrivalGalaxy S20 FE 4G
    $511
  • GooglerivalPixel 5
    $682
  • SamsungrivalGalaxy S21
    $658
  • SamsungrivalGalaxy S21 Plus
    $650
  • XiaomirivalMi 10T Pro
    $480
  • OnePlusrival8T
    $561
  • XiaomirivalMi 10
    $529
  • XiaomirivalMi 11
    $698
  • OpporivalFind X3 Lite
    $503

 Samsung Galaxy S21 
  • SonyrivalXperia 1
    $688
  • SonyrivalXperia 5
    $649
  • ApplerivaliPhone X
    $579
  • ApplerivaliPhone 11
    $700
  • SamsungrivalGalaxy Note 9
    $598
  • ApplerivaliPhone 11 Pro
    $574
  • ApplerivaliPhone XS Max
    $564
  • SamsungrivalGalaxy S10 Plus
    $689
  • SamsungrivalGalaxy S10+ EX
    $689
  • SamsungrivalGalaxy S20 EX
    $596
  • SamsungrivalGalaxy S20 SD
    $566
  • SamsungrivalGalaxy S20+ EX
    $749
  • SamsungrivalGalaxy S20+ SD
    $566
  • HuaweirivalP30 Pro
    $589
  • GooglerivalPixel 4 XL
    $579
  • SamsungrivalGalaxy S20
    $697
  • SamsungrivalGalaxy S20 Plus
    $749
  • HuaweirivalMate 20 Pro
    $548
  • HuaweirivalP40
    $666
  • XiaomirivalMi 10 Pro
    $600
  • GooglerivalPixel 5
    $682
  • ApplerivaliPhone 12 Mini
    $739
  • SamsungrivalGalaxy S21 Plus
    $650
  • OnePlusrival8T
    $561
  • XiaomirivalMi 10
    $529
  • OpporivalReno4 Pro
    $594
  • XiaomirivalMi 11
    $698
×

Formula deviation

Since the guys at DxoMark don't review every camera out there, I've come up with a formula based on the ones that they do rate, so I could get an equivalent score for the ones they don't review. After testing it against these cameras, I got the deviation between that and their DxO score.

Device: DxOScore Deviation
Samsung Galaxy A50: 88 -1
Apple iPhone XR: 104 1
Xiaomi Mi 9T Pro: 108 -7
Xiaomi Redmi Note 8 Pro: 87 1
Sony Xperia 1: 99 -1
Sony Xperia 5: 101 1
Samsung Galaxy Note 8: 100 0
Samsung Galaxy Note 10 Plus: 126 2
Apple iPhone 8 Plus: 96 -3
Xiaomi Pocophone F1: 92 -1
Apple iPhone 7 Plus: 90 -1
Apple iPhone X: 101 3
Apple iPhone 11: 112 -1
Samsung Galaxy Note 8: 100 0
Samsung Galaxy Note 9: 107 1
Apple iPhone XS Max: 110 -2
Apple iPhone 11 Pro Max: 124 1
Samsung Galaxy S10: 124 2
Apple iPhone XS: 110 -1
Samsung Galaxy S10 Plus: 120 -2
OnePlus 7 Pro: 122 0
OnePlus 7T Pro: 122 0
Huawei P30 Pro: 125 -1
Google Pixel 4: 117 0
Google Pixel 3: 103 0
Google Pixel 2: 100 0
Samsung Galaxy S20 Plus: 127 -2
Samsung Galaxy S20 Ultra: 132 2
OnePlus 6: 100 0
OnePlus 6T: 101 1
Samsung Galaxy S9 Plus: 105 -1
Huawei Mate 20 Pro: 120 0
Xiaomi Mi 9: 115 0
Huawei Mate 30 Pro: 132 0
Huawei P40 Pro: 140 -1
Apple iPhone SE 2: 101 0
OnePlus 8 Pro: 126 0
Xiaomi Mi 8: 105 1
Samsung Galaxy A71: 89 1
Xiaomi Mi 10 Pro: 134 0

As you can see, most cameras sit between 1 and -1, while a few of them go up to 2 or -2. That means it's reasonable to assume other similar cameras that they don't review to, in the worst-case scenario, be anywhere from -2 to 2 points from the score that the formula gets.

For example: Given that the Pixel 4 got 117 points and that the Pixel 4 XL share the same year and camera specs, it's reasonable to expect a score of 117 too. But in reality, if they do review that camera, it may end up anywhere between 115 and 119.

Be aware that at DxO, they give a score based on their opinion, not based on any formula. That's why I think there's an odd difference of 6 points between the iPhone 8 Plus and the iPhone X. In theory, they should have the same camera.

I'm guessing that the Mi 9T Pro got a deviation of 7 points because they tested its Chinese variant (the K20 Pro).

Update: They just changed their protocol to include preview image evaluation and trustability. I'm keeping the old table (for now) for reference purposes, and I'll be adding a new one as soon as they review at least a couple of new mclass-range cameras.

You can expect the same (or a bit bigger) deviation for high-end cameras, but anything with a score below 100-110 should be taken with a grain of salt.

This is valid for all cameras tested with the previous protocol. For those that they dclassn't test, the deviation may be up to twice as much.

×

About GeekBench 5

This is just a quick note to let you know that, if, by any chance, the smartphone you're looking for isn't on the GeekBench site yet, you can check on GsmArena.com, as they also usually test smartphones with that benchmark tool.



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