Samsung Galaxy A51 vs Oppo Realme 6

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, which is powered by MediaTek Helio G90T 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 48% higher peak brightness (637 against 431 nits)
  • More recent OS version: Android 13 versus 11
  • Slow-motion recording at 960FPS
  • Super AMOLED display (versus competitor's IPS LCD)
  • More energy-efficient CPU – Exynos 9 Octa 9611
  • Supports Dolby Atmos sound technology
  • Weighs 19 grams less
  • The front-facing camera can record video at 4K
Reasons to consider the Oppo Realme 6
  • Higher display refresh rate – 90 Hz
  • Shows 30% longer battery life (34:26 vs 26:33 hours)
  • 55% better performance in AnTuTu Benchmark (337K versus 217K)
  • Comes with 300 mAh larger battery capacity: 4300 vs 4000 mAh
  • Faster storage type - UFS 2.1 versus UFS 2.0
  • 57% faster in single-core GeekBench 5 test: 552 and 352 points
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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

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Price

Tests and specifications

Comparison table of technical specifications and tests
Phone:
vs

Display

Type Super AMOLED IPS LCD
Size 6.5 inches 6.5 inches
Resolution 1080 x 2400 pixels 1080 x 2400 pixels
Aspect ratio 20:9 20:9
PPI 405 ppi 405 ppi
Refresh rate 60 Hz 90 Hz
Max rated brightness 400 nits 480 nits
HDR support No No
Screen protection Corning Gorilla Glass 3 Corning Gorilla Glass 3
Screen-to-body ratio 87.4% 84.1%
Display features - Always-On Display -
Display tests
RGB color space 98.8% 98.7%
PWM 242 Hz Not detected
Response time 25 ms 25.4 ms
Contrast ∞ Infinity 991:1
Peak brightness test (auto)
Galaxy A51 +48%
637 nits
431 nits
Sources: NotebookCheck [3], [4]

Design and build

Height 158.5 mm (6.24 inches) 162.1 mm (6.38 inches)
Width 73.6 mm (2.9 inches) 74.8 mm (2.94 inches)
Thickness 7.9 mm (0.31 inches) 8.9 mm (0.35 inches)
Weight 172 g (6.07 oz) 191 g (6.74 oz)
Waterproof No No
Rear material Plastic Plastic
Frame material Plastic Plastic
Colors White, Black White, Blue
Fingerprint scanner Yes, in-display Yes, in home button
Screen-to-body ratio
87.4%
84.1%

Performance

Tests of Samsung Galaxy A51 and Oppo Realme 6 in the benchmarks
SoC
Chipset Samsung Exynos 9 Octa 9611 MediaTek Helio G90T
Max. clock 2300 MHz 2050 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 2 GHz: Cortex-A55
- 2 cores at 2.05 GHz: Cortex-A76
Lithography process 10 nanometers 12 nanometers
Graphics Mali-G72 MP3 Mali-G76 MC4
GPU clock 850 MHz 800 MHz
FLOPS ~259 GFLOPS ~184 GFLOPS

Benchmarks

Geekbench 5 (Single-Core)
Realme 6 +57%
552
Geekbench 5 (Multi-Core)
1298
Realme 6 +34%
1745
AnTuTu Benchmark 9
217818
Realme 6 +55%
337076
CPU 49711 100458
GPU 53719 87086
Memory 43824 57397
UX 70475 90326
Total score 217818 337076
3DMark Wild Life Performance
Realme 6 +60%
1302
Stability 95% 98%
Graphics test 4 FPS 7 FPS
Graphics score 812 1302
Sources: 3DMark [3], [4]

Memory

RAM
RAM size 4, 6 GB 4, 8 GB
Memory type LPDDR4X LPDDR4X
Memory clock 1866 MHz 1866 MHz
Channels 2 2
Storage
Storage size 64, 128 GB 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

Software

Operating system Android 10 (Can be upgraded to Android 13) Android 10.0 (Can be upgraded to Android 11.0)
ROM One UI 5.0 Realme UI 2
OS size 23 GB 13 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 (100% in 55 min)
Full charging time 1:50 hr 0:55 hr
Battery life tests
Web browsing 09:34 hr 13:07 hr
Watching video 11:29 hr 11:20 hr
Gaming 05:12 hr 05:29 hr
Standby 83 hr 126 hr
General battery life
26:33 hr
Realme 6 +30%
34:26 hr

Camera

Specs and camera test of smartphones
Main camera
Matrix 48 megapixels 64 megapixels
Image resolution 8000 x 6000 9248 x 6920
Zoom Digital Digital
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 60FPS
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 + 8 MP + 2 MP + 2 MP)
Wide (main) lens - 48 MP
- Aperture: f/2.0
- Focal length: 26 mm
- Pixel size: 0.8 micron
- Sensor: 1/2", Sony IMX582 (Exmor-RS 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
Ultra-wide lens - 12 MP
- Aperture: f/2.2
- Focal length: 13 mm
- Pixel size: 1.12 micron
- 8 MP
- Aperture: f/2.3
- Focal length: 13 mm
- Pixel size: 1.12 micron
- Sensor: 1/4.0" (CMOS)
Monochrome lens - - 2 MP
- Aperture: f/2.4
- Focal length: 22 mm
- Pixel size: 1.75 micron
- Sensor: 1/5" (CMOS)
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
Selfie camera
Megapixels 32 megapixels 16 megapixels
Image resolution 6560 x 4928 4920 x 3264
Aperture f/2.2 f/2.0
Focal length 26 mm 26 mm
Pixel size 0.8 microns 1 microns
Sensor type ISOCELL CMOS 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
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, Galileo
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 -

Sound

Speakers Mono Mono
Headphone audio jack Yes Yes
FM radio Yes Yes
Dolby Atmos Yes No
Speakers test
Max. loudness
81.7 dB
Realme 6 +7%
87.4 dB

Other

Category Mid-range Mid-range
Announced December 2019 March 2020
Release date December 2019 March 2020
SAR (head) 0.596 W/kg 0.71 W/kg
SAR (body) 1.45 W/kg 0.57 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 software, camera, design, and sound are more important to you, then choose the Samsung Galaxy A51. But if the performance and battery life are more of a priority – go for the Oppo Realme 6.

Cast your vote

So, which phone would you choose?
69 (24.6%)
212 (75.4%)
Total votes: 281

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