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Samsung Galaxy S21 vs Oppo Find X3

Here we compared two flagship smartphones: the 6.2-inch Samsung Galaxy S21 (with Exynos 2100) that was released on January 14, 2021, against the Oppo Find X3, which is powered by Qualcomm Snapdragon 870 5G and came out 1 month after. On this page, you will find tests, full specs, strengths, and weaknesses of each of the gadgets.

Key differences

An overview of the main advantages of each smartphone
Reasons to consider the Samsung Galaxy S21
  • Slow-motion recording at 960FPS
  • Uses a faster type of memory: LPDDR5 2750 MHz
  • More energy-efficient CPU – Exynos 2100
  • 17% faster in single-core GeekBench 5 test: 1030 and 881 points
  • Weighs 24 grams less
  • The front-facing camera can record video at 4K
  • Ready for eSIM technology
Reasons to consider the Oppo Find X3
  • The rear camera has a 2x optical zoom
  • Delivers 52% higher maximum brightness (1299 against 853 nits)
  • 25% higher pixel density (525 vs 421 PPI)
  • Newer Bluetooth version (v5.2)
  • Has a 0.5 inch larger screen size
  • Comes with 500 mAh larger battery capacity: 4500 vs 4000 mAh

Review

Display
Screen quality, color accuracy, brightness
Performance
CPU/GPU performance in apps and games
Battery
Battery life, charging type and speed
Camera
Photo and video recording quality
Connectivity
Networks, ports, data transmission
NanoReview score
Final comparison evaluation

Value for money

You can enter your local price of these phones (in USD or any other currency) and click on the "Calculate" button to see which one has a better value for money.
Price

Tests and specifications

Comparison table of technical specifications and tests
Phone:
vs

Display

Type Dynamic AMOLED AMOLED
Size 6.2 inches 6.7 inches
Resolution 1080 x 2400 pixels 1440 x 3216 pixels
Aspect ratio 20:9 20:9
PPI 421 ppi 525 ppi
Refresh rate 120 Hz 120 Hz
HDR support Yes, HDR10+ Yes, HDR10+
Screen protection Gorilla Glass Victus Corning Gorilla Glass 5
Screen-to-body ratio 87.2% 89.6%
Display features - DCI-P3
- Always-On Display
- DCI-P3
- Always-On Display
Display tests
RGB color space 99.5% -
PWM 240 Hz -
Response time 5 ms -
Contrast ∞ Infinity -
Max. Brightness
853 nits
Find X3 +52%
1299 nits
Sources: NotebookCheck [1]

Design and build

Height 151.7 mm (5.97 inches) 163.6 mm (6.44 inches)
Width 71.2 mm (2.8 inches) 74 mm (2.91 inches)
Thickness 7.9 mm (0.31 inches) 8.3 mm (0.33 inches)
Weight 169 gramm (5.96 oz) 193 gramm (6.81 oz)
Waterproof IP68 IP68
Rear material Plastic Glass
Frame material Metal Metal
Colors White, Gray, Pink, Purple White, Black, Blue
Fingerprint scanner Yes, in-display Yes, in-display
Screen-to-body ratio
87.2%
Find X3 +3%
89.6%

Performance

Tests of Samsung Galaxy S21 and Oppo Find X3 in the benchmarks
SoC
Chipset Samsung Exynos 2100 Qualcomm Snapdragon 870 5G
Max. clock 2900 MHz 3200 MHz
CPU cores 8 (1 + 3 + 4) 8 (1 + 3 + 4)
Architecture - 4 cores at 2.2 GHz: Cortex-A55
- 3 cores at 2.8 GHz: Cortex-A78
- 1 core at 2.9 GHz: Cortex-X1
- 4 cores at 1.8 GHz: Kryo 585 Silver (Cortex-A55)
- 3 cores at 2.42 GHz: Kryo 585 Gold (Cortex-A77)
- 1 core at 3.2 GHz: Kryo 585 Prime (Cortex-A77)
L3 cache - 4 MB
Lithography process 5 nanometers 7 nanometers
Graphics Mali-G78 MP14 Adreno 650
GPU clock 760 MHz 675 MHz
FLOPS - ~1372 GFLOPS
Memory
RAM size 8 GB 8 GB
Memory type LPDDR5 LPDDR4X
Memory clock 2750 MHz 2133 MHz
Channels 2 2
Storage
Storage size 128, 256 GB 128, 256 GB
Storage type UFS 3.1 UFS 3.1
Memory card No No

Benchmarks

Geekbench 5 (Single-Core)
Galaxy S21 +17%
1030
881
Geekbench 5 (Multi-Core)
3189
3100
AnTuTu Benchmark 9
678986
Find X3 +4%
703077
AnTuTu Results (57th and 46th place)

Software

Operating system Android 11 Android 11
ROM One UI 3.1 ColorOS 11.2
OS size 28.1 GB -

Battery

Specifications
Capacity 4000 mAh 4500 mAh
Charge power 25 W 65 W
Battery type Li-Ion Li-Po
Replaceable No No
Wireless charging Yes (15 W) Yes (30 W)
Reverse charging Yes, (wireless) Yes, (wireless)
Fast charging Yes (55% in 50 min) Yes (40% in 10 min)
Full charging time 1:35 hr 1:20 hr

Battery life tests

Web browsing (Wi-Fi)
10:57 hr
n/a
Watching videos (Player)
15:10 hr
n/a
Talk (3G)
27:30 hr
n/a

Camera

Specs and camera test of smartphones
Main camera
Matrix 12 megapixels 50 megapixels
Image resolution 4000 x 3000 8700 x 5800
Zoom Optical, 1.1x Optical, 2x
Flash Dual LED LED
Stabilization Optical Optical
8K video recording Up to 24FPS No
4K video recording Up to 60FPS Up to 60FPS
1080p video recording Up to 60FPS Up to 60FPS
Slow motion 960 FPS (720p) 240 FPS (1080p)
Angle of widest lens 120° 110°
Lenses 3 (12 MP + 64 MP + 12 MP) 4 (50 MP + 13 MP + 50 MP + 3 MP)
Wide (main) lens - 12 MP
- Aperture: f/1.8
- Focal length: 26 mm
- Pixel size: 1.8 micron
- Sensor: 1/1.76", Sony IMX555 (Exmor-RS CMOS)
- Phase autofocus (Dual Pixel)
- Optical stabilization
- 50 MP
- Aperture: f/1.8
- Pixel size: 1 micron
- Sensor: 1/1.56", Sony IMX766 (Exmor-RS CMOS)
- Phase autofocus
- Optical stabilization
Telephoto lens - 64 MP
- Aperture: f/2.0
- Focal length: 28 mm
- Pixel size: 0.8 micron
- Sensor: 1/1.72", Samsung Bright S5KGW2 (ISOCELL Plus CMOS)
- Phase autofocus (Dual Pixel)
- Optical stabilization
- 13 MP
- Aperture: f/2.4
- Focal length: 52 mm
- Pixel size: 1 micron
- Sensor: 1/3.4", Samsung S5K3M5 (ISOCELL CMOS)
- Phase autofocus
Ultra-wide lens - 12 MP
- Aperture: f/2.2
- Focal length: 13 mm
- Pixel size: 1.4 micron
- Sensor: 1/2.55", Sony IMX563 (Exmor-RS CMOS)
- Phase autofocus (Dual Pixel)
- 50 MP
- Aperture: f/2.2
- Pixel size: 1 micron
- Sensor: 1/1.56", Sony IMX766 (Exmor-RS CMOS)
- Phase autofocus
Macro lens - - 3 MP
- Aperture: f/3.0
- Pixel size: 1.12 micron
- Sensor: 1/5", GalaxyCore GC5035 (CMOS)
Camera features - Bokeh mode
- Pro mode
- RAW support
- Bokeh mode
- Pro mode
- RAW support
Samples Photo samples of Samsung Galaxy S21 from DxOMark -
Selfie camera
Megapixels 10 megapixels 32 megapixels
Image resolution 3872 x 2592 6464 x 4864
Aperture f/2.2 f/2.4
Focal length 26 mm 26 mm
Pixel size 1.22 microns 0.8 microns
Sensor type CMOS Exmor-RS CMOS
Sensor size 1/3.24" 1/2.8"
Video resolution 2160p (4K) at 60 FPS 1080p (Full HD) at 30 FPS

DxOMark camera tests

Photo quality
Video quality
Generic camera score

Connectivity

Wi-Fi standard Wi-Fi 6 (802.11 a/b/g/n/ac/ax) Wi-Fi 6 (802.11 a/b/g/n/ac/ax)
Wi-Fi features - Dual Band
- Wi-Fi MiMO
- Wi-Fi Direct
- Wi-Fi Hotspot
- Wi-Fi Display
- Dual Band
- Wi-Fi MiMO
- Wi-Fi Direct
- Wi-Fi Hotspot
- Wi-Fi Display
Bluetooth version 5 5.2
Bluetooth features LE, A2DP LE, A2DP
USB type USB Type-C USB Type-C
USB version 3.2 3.1
USB features - Charging
- USB-Storage mode
- USB-Host mode
- OTG
- Charging
- USB-Storage mode
- OTG
GPS GPS, GLONASS, Beidou, Galileo GPS, GLONASS, Beidou, Galileo, QZSS
NFC* Yes Yes
Infrared port No No
Network
Number of SIM* 2 2
Type of SIM card Nano Nano
Multi SIM mode Standby Standby
eSIM support* Yes No
Hybrid slot No No
LTE Cat* 24 24
5G support Yes Yes

Sound

Speakers Stereo Stereo
Headphone audio jack No No
FM radio No No
Dolby Atmos Yes Yes
Speakers test
Max. loudness
87 dB
n/a

Other

Category Flagship Flagship
Announced January 2021 March 2021
Release date February 2021 March 2021
Launch price ~ 937 USD ~ 635 USD
SAR (head) 0.46 W/kg -
SAR (body) 1.51 W/kg -
Sensors - Hall-effect sensor
- Barometer
- Proximity sensor
- Gyroscope
- Accelerometer
- Ambient light sensor
- Compass
- Fingerprint
- Proximity sensor
- Gyroscope
- Accelerometer
- Ambient light sensor
- Compass
- Fingerprint
*Disclaimer! NFC, GSM network support, and some other specs can be different depending on the country.

Conclusion

If the software, camera, and sound are more important to you, then choose the Samsung Galaxy S21. But if the display is more of a priority – go for the Oppo Find X3.

Cast your vote

So, which phone would you choose?
0 (0%)
3 (100%)
Total votes: 3

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