Samsung Galaxy A51 vs Oppo Realme 6 Pro

Here we compared two mid-range smartphones: the 6.5-inch Samsung Galaxy A51 (with Exynos 9 Octa 9611) that was released on December 12, 2019, against the Oppo Realme 6 Pro, which is powered by Qualcomm Snapdragon 720G and came out 3 months 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 A51
  • Delivers 52% higher maximum brightness (640 against 422 nits)
  • Slow-motion recording at 960FPS
  • Super AMOLED display (versus competitor's IPS LCD)
  • Weighs 30 grams less
  • The front-facing camera can record video at 4K
Reasons to consider the Oppo Realme 6 Pro
  • Higher display refresh rate – 90 Hz
  • 59% better performance in AnTuTu Benchmark (343K versus 215K)
  • The rear camera has a 2x optical zoom
  • Shows 24% longer battery life (107 vs 86 hours)
  • Newer Bluetooth version (v5.1)
  • Comes with 300 mAh larger battery capacity: 4300 vs 4000 mAh
  • Faster storage type - UFS 2.1 versus UFS 2.0
  • More energy-efficient CPU – Snapdragon 720G
  • 55% faster in single-core GeekBench 5 test: 543 and 351 points

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

Display

Type Super AMOLED IPS LCD
Size 6.5 inches 6.6 inches
Resolution 1080 x 2400 pixels 1080 x 2400 pixels
Aspect ratio 20:9 20:9
PPI 405 ppi 399 ppi
Refresh rate 60 Hz 90 Hz
HDR support No No
Screen protection Corning Gorilla Glass 3 Corning Gorilla Glass 5
Screen-to-body ratio 87.4% 84.7%
Display features - Always-On Display -
Display tests
RGB color space 98.8% 98.4%
PWM 242 Hz 2336 Hz
Response time 25 ms 28.4 ms
Contrast ∞ Infinity 1195:1
Max. Brightness
Galaxy A51 +52%
640 nits
422 nits
Sources: NotebookCheck [1], [2]

Design and build

Height 158.5 mm (6.24 inches) 163.8 mm (6.45 inches)
Width 73.6 mm (2.9 inches) 75.8 mm (2.98 inches)
Thickness 7.9 mm (0.31 inches) 8.9 mm (0.35 inches)
Weight 172 gramm (6.07 oz) 202 gramm (7.13 oz)
Waterproof No No
Rear material Plastic Glass
Frame material Plastic Plastic
Colors White, Black Blue, Red, Orange
Fingerprint scanner Yes, in-display Yes, in home button
Screen-to-body ratio
87.4%
84.7%

Performance

Tests of Samsung Galaxy A51 and Oppo Realme 6 Pro in the benchmarks
SoC
Chipset Samsung Exynos 9 Octa 9611 Qualcomm Snapdragon 720G
Max. clock 2300 MHz 2300 MHz
CPU cores 8 (4 + 4) 8 (2 + 6)
Architecture - 4 cores at 1.7 GHz: Cortex-A53
- 4 cores at 2.3 GHz: Cortex-A73
- 6 cores at 1.8 GHz: Kryo 465 Silver (Cortex-A55)
- 2 cores at 2.3 GHz: Kryo 465 Gold (Cortex-A76)
L3 cache - 1 MB
Lithography process 10 nanometers 8 nanometers
Graphics Mali-G72 MP3 Adreno 618
GPU clock 850 MHz 800 MHz
FLOPS ~259 GFLOPS ~435 GFLOPS
Memory
RAM size 4, 6 GB 6, 8 GB
Memory type LPDDR4X LPDDR4X
Memory clock 1866 MHz 1866 MHz
Channels 2 2
Storage
Storage size 64, 128 GB 64, 128 GB
Storage type UFS 2.0 UFS 2.1
Memory card MicroSD MicroSD
Memory card max. size Up to 512 GB Up to 256 GB

Benchmarks

Geekbench 5 (Single-Core)
543
Geekbench 5 (Multi-Core)
1297
1654
AnTuTu Benchmark 9
215802
343149

Software

Operating system Android 10 (Can be upgraded to Android 11) Android 10.0 (Can be upgraded to Android 11)
ROM One UI 3.0 Realme UI
OS size 23 GB 15 GB

Battery

Specifications
Capacity 4000 mAh 4300 mAh
Charge power 15 W 30 W
Battery type Li-Po Li-Ion
Replaceable No No
Wireless charging No No
Reverse charging No No
Fast charging Yes (40% in 35 min) Yes, VOOC 4.0 (100% in 57 min)
Full charging time 1:50 hr 0:57 hr

Battery life tests

Web browsing (Wi-Fi)
13:21 hr
14:42 hr
Watching videos (Player)
14:22 hr
14:01 hr
Talk (3G)
21:51 hr
31:12 hr

Camera

Specs and camera test of smartphones
Main camera
Matrix 48 megapixels 64 megapixels
Image resolution 8000 x 6000 9000 x 7000
Zoom Digital Optical, 2x
Flash LED LED
Stabilization Digital Digital
8K video recording No No
4K video recording Up to 30FPS Up to 30FPS
1080p video recording Up to 30FPS Up to 120FPS
Slow motion 960 FPS (720p) 240 FPS (720p)
Angle of widest lens 120° 119°
Lenses 4 (48 MP + 12 MP + 5 MP + 5 MP) 4 (64 MP + 12 MP + 8 MP + 2 MP)
Wide (main) lens - 48 MP
- Aperture: f/2.0
- Focal length: 26 mm
- Pixel size: 0.8 micron
- Sensor: 1/2", Samsung S5KGM2 (ISOCELL CMOS)
- Phase autofocus
- 64 MP
- Aperture: f/1.8
- Focal length: 26 mm
- Pixel size: 0.8 micron
- Sensor: 1/1.72", Samsung Bright S5KGW1 (ISOCELL Plus CMOS)
- Phase autofocus
Telephoto lens - - 12 MP
- Aperture: f/2.5
- Focal length: 54 mm
- Pixel size: 1 micron
- Sensor: 1/3.4" (CMOS)
Ultra-wide lens - 12 MP
- Aperture: f/2.2
- Focal length: 13 mm
- Pixel size: 1.12 micron
- 8 MP
- Aperture: f/2.5
- Focal length: 13 mm
- Pixel size: 1.12 micron
- Sensor: 1/4.0"
Macro lens - 5 MP
- Aperture: f/2.4
- Focal length: 40 mm
- Pixel size: 1.12 micron
- 2 MP
- Aperture: f/2.4
- Focal length: 22 mm
- Pixel size: 1.75 micron
- Sensor: 1/5.0" (CMOS)
Depth lens - 5 MP
- Aperture: f/2.2
- Pixel size: 1.12 micron
- Sensor: 1/5.0" (CMOS)
-
Camera features - Bokeh mode
- Pro mode
- Bokeh mode
- Pro mode
- RAW support
Selfie camera
Megapixels 32 megapixels 16 megapixels
Image resolution 6560 x 4928 4920 x 3264
Aperture f/2.2 f/2.1
Focal length 26 mm 26 mm
Pixel size 0.8 microns 1 microns
Sensor type ISOCELL CMOS Exmor-RS CMOS
Sensor size 1/2.8" 1/3.1"
Video resolution 2160p (4K) at 30 FPS 1080p (Full HD) at 30 FPS

Connectivity

Wi-Fi standard Wi-Fi 5 (802.11 b/g/n/ac) Wi-Fi 5 (802.11 b/g/n/ac)
Wi-Fi features - Dual Band
- Wi-Fi Direct
- Wi-Fi Hotspot
- Wi-Fi Display
- Dual Band
- Wi-Fi Direct
- Wi-Fi Hotspot
- Wi-Fi Display
Bluetooth version 5 5.1
Bluetooth features PBAP/PAB, PAN, OPP, MAP, HSP, HID, HFP, DIP, AVRCP, A2DP LE, A2DP
USB type USB Type-C USB Type-C
USB version 2 2
USB features - Charging
- USB-Storage mode
- OTG
- Charging
- USB-Storage mode
- OTG
GPS GPS, GLONASS, Beidou, Galileo GPS, GLONASS, Beidou
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* No No
Hybrid slot No No
LTE Cat* 12 6
5G support No No

Sound

Speakers Mono Mono
Headphone audio jack Yes Yes
FM radio Yes Yes
Dolby Atmos Yes Yes
Speakers test
Max. loudness
81.7 dB
82 dB

Other

Category Mid-range Mid-range
Announced December 2019 March 2020
Release date December 2019 March 2020
Launch price ~ 250 USD ~ 275 USD
SAR (head) 0.596 W/kg 1.19 W/kg
SAR (body) 1.45 W/kg 0.92 W/kg
Sensors - 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 performance, battery life, and design are more important to you, then choose the Oppo Realme 6 Pro. But if the software and camera are more of a priority – go for the Samsung Galaxy A51.

Cast your vote

So, which phone would you choose?
49 (22.2%)
172 (77.8%)
Total votes: 221

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