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Samsung Galaxy A51 vs Oppo Reno Z

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 Reno Z, which is powered by Mediatek Helio P90 and came out 7 months before. 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 27% higher maximum brightness (636 against 501 nits)
  • Has an ultra-wide angle camera lens
  • More recent OS version: Android 11 versus 10
  • Slow-motion recording at 960FPS
  • More energy-efficient CPU – Exynos 9 Octa 9611
  • Supports Dolby Atmos sound technology
  • Weighs 14 grams less
  • The phone is 7-months newer
  • The front-facing camera can record video at 4K
Reasons to consider the Oppo Reno Z
  • Optical image stabilization
  • 19% better performance in AnTuTu Benchmark (210K versus 176K)
  • Faster storage type - UFS 2.1 versus UFS 2.0
  • 20% faster in single-core GeekBench 5 test: 419 and 350 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
Phone:
vs

Display

Type Super AMOLED AMOLED
Size 6.5 inches 6.4 inches
Resolution 1080 x 2400 pixels 1080 x 2340 pixels
Aspect ratio 20:9 19.5:9
PPI 405 ppi 403 ppi
Refresh rate 60 Hz 60 Hz
HDR support No Yes, HDR10
Screen protection Corning Gorilla Glass 3 Tempered glass
Screen-to-body ratio 87.4% 85.3%
Display features - Always-On Display - DCI-P3
- Always-On Display
Display tests
RGB color space 98.8% -
PWM 242 Hz -
Response time 25 ms -
Contrast ∞ Infinity -
Max. Brightness
Galaxy A51 +27%
636 nits
501 nits
Sources: NotebookCheck [1]

Design and build

Height 158.5 mm (6.24 inches) 157.3 mm (6.19 inches)
Width 73.6 mm (2.9 inches) 74.9 mm (2.95 inches)
Thickness 7.9 mm (0.31 inches) 9.1 mm (0.36 inches)
Weight 172 gramm (6.07 oz) 186 gramm (6.56 oz)
Waterproof No No
Rear material Plastic Glass
Frame material Plastic Plastic
Colors White, Black Blue
Fingerprint scanner Yes, in-display Yes, in-display
Screen-to-body ratio
87.4%
85.3%

Performance

Tests of Samsung Galaxy A51 and Oppo Reno Z in the benchmarks
SoC
Chipset Samsung Exynos 9 Octa 9611 Mediatek Helio P90
Max. clock 2300 MHz 2200 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 2.2 GHz: Cortex A75
Lithography process 10 nanometers 12 nanometers
Graphics Mali-G72 MP3 PowerVR GM9446
GPU clock 850 MHz 970 MHz
FLOPS ~259 GFLOPS ~124 GFLOPS
Memory
RAM size 4, 6 GB 6 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

Benchmarks

Geekbench 5 (Single-Core)
Reno Z +20%
419
Geekbench 5 (Multi-Core)
1306
Reno Z +21%
1582
AnTuTu Benchmark 8
176685
Reno Z +19%
210575

Software

Operating system Android 10 (Can be upgraded to Android 11) Android 9.0 (Can be upgraded to Android 10)
ROM One UI 3.0 ColorOS 7
OS size 23 GB -

Battery

Specifications
Capacity 4000 mAh 3950 mAh
Charge power 15 W 20 W
Battery type Li-Po Li-Po
Replaceable No No
Wireless charging No No
Reverse charging No No
Fast charging Yes (40% in 35 min) Yes, VOOC 3.0 (60% in 30 min)
Full charging time 1:50 hr 1:15 hr

Battery life tests

Web browsing (Wi-Fi)
13:21 hr
n/a
Watching videos (Player)
14:22 hr
n/a
Talk (3G)
21:51 hr
n/a

Camera

Specs and camera test of smartphones
Main camera
Matrix 48 megapixels 48 megapixels
Image resolution 8000 x 6000 8000 x 6000
Zoom Digital Digital
Flash LED LED
Stabilization Digital Optical
8K video recording No No
4K video recording Up to 30FPS Up to 30FPS
1080p video recording Up to 120FPS Up to 120FPS
Slow motion 960 FPS (720p) 480 FPS (720p)
Angle of widest lens 120° -
Lenses 4 (48 MP + 12 MP + 5 MP + 5 MP) 2 (48 MP + 5 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
- 48 MP
- Aperture: f/1.7
- Focal length: 26 mm
- Pixel size: 0.8 micron
- Sensor: 1/2.0", Sony IMX586 (Exmor-RS CMOS)
- Phase autofocus
- Optical stabilization
Ultra-wide lens - 12 MP
- Aperture: f/2.2
- Focal length: 13 mm
- Pixel size: 1.12 micron
-
Macro lens - 5 MP
- Aperture: f/2.4
- Focal length: 40 mm
- Pixel size: 1.12 micron
-
Depth lens - 5 MP
- Aperture: f/2.2
- Pixel size: 1.12 micron
- Sensor: 1/5.0" (CMOS)
- 5 MP
- Aperture: f/2.4
Camera features - Bokeh mode
- Pro mode
- Bokeh mode
- Pro mode
Selfie camera
Megapixels 32 megapixels 32 megapixels
Image resolution 6560 x 4928 6528 x 4896
Aperture f/2.2 f/2
Focal length 26 mm -
Pixel size 0.8 microns 0.8 microns
Sensor type ISOCELL CMOS CMOS
Sensor size 1/2.8" -
Video resolution 2160p (4K) при 30 FPS 1080p (Full HD) при 30 FPS

Connectivity

Wi-Fi standard Wi-Fi 5 (802.11 b/g/n/ac) Wi-Fi 5 (802.11 a/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
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 13
5G support No No

Sound

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

Other

Category Mid-range Mid-range
Announced December 2019 May 2019
Release date December 2019 July 2019
Launch price ~ 250 USD ~ 325 USD
SAR (head) 0.596 W/kg -
SAR (body) 1.45 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 is more of a priority – go for the Oppo Reno Z.

Cast your vote

So, which phone would you choose?
0 (0%)
6 (100%)
Total votes: 6

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