Vivo iQOO Z3 vs Samsung Galaxy M51

Here we compared two mid-range smartphones: the 6.58-inch Vivo iQOO Z3 (with Qualcomm Snapdragon 768G 5G) that was released on March 25, 2021, against the Samsung Galaxy M51, which is powered by Qualcomm Snapdragon 730G 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 Vivo iQOO Z3
  • Higher display refresh rate – 120 Hz
  • Newer Bluetooth version (v5.1)
  • 32% better performance in AnTuTu Benchmark (443K versus 335K)
  • Faster storage type - UFS 2.2 versus UFS 2.1
  • Weighs 48 grams less
  • 25% faster in single-core GeekBench 5 test: 677 and 541 points
  • The phone is 7-months newer
Reasons to consider the Samsung Galaxy M51
  • Comes with 2600 mAh larger battery capacity: 7000 vs 4400 mAh
  • Delivers 12% higher maximum brightness (671 against 600 nits)
  • Super AMOLED display (versus competitor's IPS LCD)
  • Reverse charging feature
  • Supports Dolby Atmos sound technology

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 IPS LCD Super AMOLED
Size 6.58 inches 6.7 inches
Resolution 1080 x 2408 pixels 1080 x 2400 pixels
Aspect ratio 20:9 20:9
PPI 401 ppi 393 ppi
Refresh rate 120 Hz 60 Hz
HDR support Yes, HDR10 No
Screen protection Tempered glass Corning Gorilla Glass 3
Screen-to-body ratio 84.5% 86.7%
Display features - DCI-P3 - Always-On Display
Display tests
RGB color space - 97.6%
PWM - 255 Hz
Response time - 8 ms
Contrast - ∞ Infinity
Max. Brightness
600 nits
Galaxy M51 +12%
671 nits
Sources: NotebookCheck [1]

Design and build

Height 160.6 mm (6.32 inches) 163.9 mm (6.45 inches)
Width 73.9 mm (2.91 inches) 76.3 mm (3 inches)
Thickness 7.7 mm (0.3 inches) 9.5 mm (0.37 inches)
Weight 165 gramm (5.82 oz) 213 gramm (7.51 oz)
Waterproof No No
Rear material Plastic Plastic
Frame material Plastic Plastic
Colors Black, Silver, Blue White, Black
Fingerprint scanner Yes, in home button Yes, in home button
Screen-to-body ratio
84.5%
86.7%

Performance

Tests of Vivo iQOO Z3 and Samsung Galaxy M51 in the benchmarks
SoC
Chipset Qualcomm Snapdragon 768G 5G Qualcomm Snapdragon 730G
Max. clock 2800 MHz 2200 MHz
CPU cores 8 (1 + 1 + 6) 8 (2 + 6)
Architecture - 6 cores at 1.8 GHz: Kryo 475 Silver (Cortex-A55)
- 1 core at 2.4 GHz: Kryo 475 Gold (Cortex-A76)
- 1 core at 2.8 GHz: Kryo 475 Prime (Cortex-A76)
- 6 cores at 1.8 GHz: Kryo 470 Silver (Cortex-A55)
- 2 cores at 2.2 GHz: Kryo 470 Gold (Cortex-A76)
Lithography process 7 nanometers 8 nanometers
Graphics Adreno 620 Adreno 618
GPU clock 750 MHz 500 MHz
FLOPS ~700 GFLOPS ~386 GFLOPS
Memory
RAM size 6, 8, 12 GB 6 GB
Memory type LPDDR4X LPDDR4X
Memory clock 2133 MHz 1866 MHz
Channels 2 2
Storage
Storage size 128, 256 GB 128 GB
Storage type UFS 2.2 UFS 2.1
Memory card MicroSD MicroSD
Memory card max. size Up to 512 GB Up to 512 GB

Benchmarks

Geekbench 5 (Single-Core)
iQOO Z3 +25%
677
Geekbench 5 (Multi-Core)
iQOO Z3 +20%
1979
1647
AnTuTu Benchmark 9
iQOO Z3 +32%
443687
335603

Software

Operating system Android 11 Android 10 (Can be upgraded to Android 11.0)
ROM Funtouch OS 11.1 One UI 3.1
OS size - 22 GB

Battery

Specifications
Capacity 4400 mAh 7000 mAh
Charge power 55 W 25 W
Battery type Li-Po Li-Ion
Replaceable No No
Wireless charging No No
Reverse charging No Yes
Fast charging Yes Yes (35% in 30 min)
Full charging time - 1:47 hr

Battery life tests

Web browsing (Wi-Fi)
n/a
16:52 hr
Watching videos (Player)
n/a
25:14 hr
Talk (3G)
n/a
52:57 hr

Camera

Specs and camera test of smartphones
Main camera
Matrix 64 megapixels 64 megapixels
Image resolution 9248 x 6920 9248 x 6920
Zoom Digital Digital
Flash LED LED
Stabilization Digital Digital
8K video recording No No
4K video recording Up to 60FPS Up to 30FPS
1080p video recording Up to 60FPS Up to 30FPS
Slow motion 240 FPS (720p) 240 FPS (720p)
Angle of widest lens 120° 123°
Lenses 3 (64 MP + 8 MP + 2 MP) 4 (64 MP + 12 MP + 5 MP + 5 MP)
Wide (main) lens - 64 MP
- Aperture: f/1.8
- Focal length: 26 mm
- Pixel size: 0.7 micron
- Sensor: 1/1.97", Samsung GW3 (CMOS)
- Phase autofocus
- 64 MP
- Aperture: f/1.8
- Focal length: 26 mm
- Pixel size: 0.8 micron
- Sensor: 1/1.7", Sony IMX682 (Exmor-RS CMOS)
- Phase autofocus
Ultra-wide lens - 8 MP
- Aperture: f/2.2
- Focal length: 16 mm
- Pixel size: 1.12 micron
- Sensor: 1/4.0" (CMOS)
- 12 MP
- Aperture: f/2.2
- Pixel size: 1.12 micron
Macro lens - 2 MP
- Aperture: f/2.4
- 5 MP
- Aperture: f/2.4
Depth lens - - 5 MP
- Aperture: f/2.4
- Pixel size: 1.12 micron
Camera features - Bokeh mode
- Pro mode
- Bokeh mode
- Pro mode
Selfie camera
Megapixels 16 megapixels 32 megapixels
Image resolution 4920 x 3264 6464 x 4864
Aperture f/2.0 f/2.2
Focal length - 26 mm
Pixel size - 0.8 microns
Sensor type CMOS Exmor-RS CMOS
Sensor size - 1/2.8"
Video resolution 1080p (Full HD) at 30 FPS 1080p (Full HD) at 30 FPS

Connectivity

Wi-Fi standard Wi-Fi 5 (802.11 a/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 5.1 5
Bluetooth features LE, A2DP LE, A2DP
USB type USB Type-C USB Type-C
USB version 2 2
USB features - Charging
- USB-Storage mode
- Charging
- USB-Storage mode
GPS GPS, GLONASS, Beidou, Galileo GPS, GLONASS, Beidou, Galileo
NFC* No 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 Yes No
LTE Cat* 18 15
5G support Yes No

Sound

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

Other

Category Mid-range Mid-range
Announced March 2021 August 2020
Release date April 2021 September 2020
SAR (head) - 0.609 W/kg
SAR (body) - 1.446 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 display and performance are more important to you, then choose the Vivo iQOO Z3. But if the software, battery life, and sound are more of a priority – go for the Samsung Galaxy M51.

Cast your vote

So, which phone would you choose?
9 (64.3%)
5 (35.7%)
Total votes: 14

User opinions

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