Home Phone comparison Samsung Galaxy M21 and Samsung Galaxy A51 - Which is better?

Samsung Galaxy M21 vs Samsung Galaxy A51

45 out 100
Samsung Galaxy M21
VS
41 out 100
Samsung Galaxy A51
Samsung Galaxy M21
Samsung Galaxy A51

Compared 2 smartphones : Samsung Galaxy M21 Manufactured in March, 2020, with display 6.4 with chipsetSamsung Exynos 7 Octa 9611, vs Samsung Galaxy A51, Manufactured in December, 2019 with chipsetSamsung Exynos 9 Octa 9611. Below are specs, tests, pros and cons for each device

  1. Differences
  2. Review
  3. Specs
  4. Benchmarks
  5. Battery Life
  6. Cameras
  7. Comments (0)

Key Differences

Device key advantages
Reasons to choose Samsung Galaxy M21
  • Higher battery capacity: 6000mAh vs 4000mAh
Reasons to choose Samsung Galaxy A51
  • Larger display: 6.5in
  • Higher pixel density: 405ppi
  • Lighter design: 172g vs 188g

Versions

Available versions and configurations
Memory Options - 4/64 GB
- 6/128 GB		 - 4/64 GB
- 4/128 GB
- 6/128 GB
- 8/128 GB
- 8/256 GB

Review

Key Specs Samsung Galaxy M21 and Samsung Galaxy A51
Display
Color accuracy, sharpness & brightness
Camera
Main & front camera tests
Performance
App & system performance
Games
3D gaming performance
Battery
Battery life, charging speed & type
Connectivity
Connectivity features
NanoReview Score
Overall score by NanoReview
Adjust each parameter’s importance to find the best match for you.
Customize your score
Function
Importance (Weight)
Display:
Camera:
Performance:
Gaming:
Battery:
Connectivity:
Higher weight means greater impact on NanoReview score.

Tests & specs

Specs & test comparison
Smartphones:
Samsung Galaxy M21
vs
Samsung Galaxy A51

Display

Display quality comparison
Type Super AMOLED Super AMOLED
Size 6.4 in 6.5 in
Resolution 1080x2340 pixels 1080x2400 pixels
Aspect ratio 19.5:9 20:9
Pixel density 403 ppi 405 ppi
Refresh rate 60 Hz 60 Hz
Adaptive refresh rate No No
Max brightness 630 nits 400 nits
HDR support No No
Screen-to-body ratio 84.2 % 87.5 %
Features Always-On Display Always-On Display
Display test
Peak brightness (auto)
Samsung Galaxy M21
608 nits
Samsung Galaxy A51
631 nits
sRGB gamut141.3 %98.8 %
PWM (Flicker)215 Hz242 Hz
Response time9 ms25 ms
Contrast∞ Infinite∞ Infinite
Sources: NotebookCheck [Samsung Galaxy M21], [Samsung Galaxy A51]

Design & Build

Design and ergonomics comparison
Height 159 mm (6.26 in) 158.5 mm (6.24 in)
Width 75.1 mm (2.96 in) 73.6 mm (2.9 in)
Thickness 8.9 mm (0.35 in) 7.9 mm (0.31 in)
Weight 188 g (6.63 oz) 172 g (6.07 oz)
Water resistance No No
Back panel Plastic Plastic
Frame Plastic Plastic
Colors - Black
- Blue
- Green		 - White
- Black
Fingerprint sensor Yes rear Yes In-Display
Screen-to-body ratio
Samsung Galaxy M21
84.2 %
Samsung Galaxy A51
87.5 %

Performance

Testing Samsung Galaxy M21 and Samsung Galaxy A51 In benchmarks
Processor
Chipset Samsung Exynos 7 Octa 9611 Samsung Exynos 9 Octa 9611
Max Frequency 2300 MHz 2300 MHz
CPU Cores 8 (4 + 4) 8 (4 + 4)
Architecture - 4/1.7 (Cortex-A53)
- 4/2.3 (Cortex-A73)		 - 4/1.7 (Cortex-A53)
- 4/2.3 (Cortex-A73)
Process Samsung Samsung
Transistor Size 10 nm 10 nm
Neural Processor Yes Yes
Graphics Mali-G72 MP3 Mali-G72 MP3
GPU Cores 54 54
GPU Frequency 850 MHz 850 MHz
FLOPS 113.8 GFLOPS 113.8 GFLOPS
GeekBench v6
Geekbench 6 (Single-Core)
Samsung Galaxy M21
514
Samsung Galaxy A51
512
Geekbench 6 (Multi-Core)
Samsung Galaxy M21
1558
Samsung Galaxy A51
1556
Geekbench 6 (Single-Core)514512
Geekbench 6 (Multi-Core)15581556
AnTuTu 10
AnTuTu 10
Samsung Galaxy M21
266455
Samsung Galaxy A51
268760
CPU7646883857
GPU4575645166
Memory7026963828
UX7396275909
NanoReview Score266455268760
3DMark Wild Life
3DMark Wild Life
Samsung Galaxy M21
816
Samsung Galaxy A51
812
Max Surface Temp.44.1 °C42.2 °C
Stability73 %95 %
Graphics Test4 fps4 fps
Graphics Score816812
Sources: 3DMark [Samsung Galaxy M21], [Samsung Galaxy A51]

Memory

RAM
RAM Size - 4 GB
- 6 GB		 - 4 GB
- 6 GB
Memory Type LPDDR4X LPDDR4X
Memory Frequency 1866 MHz 1866 MHz
Channels 2 2
Storage
Storage Capacity- 64 GB
- 128 GB		- 64 GB
- 128 GB
Storage TypeUFS 2.1UFS 2.0
Memory CardMicroSDMicroSD

Software

OS Android 10.0 (Upgradeable to Android 12.0) Android 10 (Upgradeable to Android 13)
OS Size 14.5 GB 23 GB
UI Skin One Ui 4.1 One UI 5.1

Battery

Volume 6000 mAh 4000 mAh
Max Charging Power 15 W 15 W
Battery Type Li-ion Li-Po
Removable No No
Wireless Charging No No
Reverse Charging No No
Fast Charging Yes Samsung Adaptive Fast Charge (25% in 30 min) Yes (40% in 35 min)
Full Charge Time 2:35 h 1:50 h
Battery Life Test
Battery Life
Samsung Galaxy M21
24:03
Samsung Galaxy A51
17:53
Web Browsing10:07 h07:15 h
Video Playback13:59 h11:25 h
Games05:35 h04:49 h
Standby Mode115 h81 h

Main camera

Matrix 48 MP 48 MP
Photo resolution 8000x6000 pixels 8000x6000 pixels
Zoom Digital Digital
Flash LED LED
Stabilization Digital Digital
8K Recording No No
4K Recording Yes (Up to 30 fps) Yes (Up to 30 fps)
1080p Recording Yes (Up to 30 fps) Yes (Up to 30 fps)
Slow Motion 240 fps (720p) 960 fps (720p)
Wide-angle lens 123 ° 120 °
Lenses count Standard: 48 MP
Ultra-wide: 8 MP
Depth: 5 MP		 Standard: 48 MP
Ultra-wide: 12 MP
Macro: 5 MP
Depth: 5 MP
Features - Bokeh effect
- Pro mode		 - Bokeh effect
- Pro mode
Main lens
Matrix48 MP48 MP
Aperturef/2.0f/2.0
Focal length26 mm26 mm
SensorSamsung S5KGM2Sony IMX582
Sensor size1/2.01/2
Pixel size0.8 μm0.8 μm
AutofocusPhase autofocusPhase autofocus
StabilizationDigitalDigital
Ultra-wide lens
Matrix8 MP12 MP
Aperturef/2.2f/2.2
Focal length12 mm13 mm
Sensor size1/4.0n/a
Pixel size1.12 μm1.12 μm
StabilizationDigitalDigital

Front camera

Matrix 20 MP 32 MP
Photo resolution 5184x3888 pixels 6560x4928 pixels
Aperture f/2.0 f/2.2
Focal length 26 mm 26 mm
Sensor CMOS Samsung S5KGD1
Sensor size n/a 1/2.8
Pixel size n/a 0.8 μm
Autofocus No No
Stabilization Digital Digital
Video resolution 1080p (Full HD) at 30 fps 2160p (4K) at 30 fps
TOF 3D sensor No No

Connectivity

Wi-Fi version 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		 - 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 PBAP/PAB, PAN, OPP, MAP, HSP, HID, HFP, DIP, AVRCP, 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
Connectivity
SIM Count*22
SIM TypeNanoNano
SIM ModeDual SIM StandbyDual SIM Standby
eSIM Support *NoNo
Hybrid SlotNoNo
2G BandsGSM850, GSM900, DCS1800, PCS1900GSM 850 / 900 / 1800 / 2100 / 2600
3G BandsB1 (2100), B2 (1900), B5(850), B8 (900)UMTS 850 / 900 / 1900 / 2100
LTE Bands*LTE (B1/B3/B5/B7/B8/B20/B38/B40/B41)LTE (B850/B900/B1800/B2100/B2600)
LTE category1212
5G SupportNoNo

Sound

Speakers Mono Mono
3.5 mm Jack Yes Yes
FM Radio Yes Yes
Dolby Atmos Yes Yes
Speaker Test
Max Volume
Samsung Galaxy M21
83.8 dB
Samsung Galaxy A51
81.7 dB

Other

Class Mid-range Mid-range
Announced March, 2020 yr December, 2019 yr
Release Date March, 2020 yr December, 2019 yr
Launch Price ($) 210 399
Sensors - Proximity Sensor
- Gyroscope
- Accelerometer
- Ambient Light Sensor
- Compass
- Fingerprint sensor		 - Proximity Sensor
- Gyroscope
- Accelerometer
- Ambient Light Sensor
- Compass
- Fingerprint sensor
* Attention! Config, frequencies, NFC, and other specs may vary by region.

Results

No clear favorite identified yet; updates may follow as new data arrives.

Survey

Which smartphone would you pick?
0 (0%)
0 (0%)
Total Votes: 0

User comments

Share your opinion or ask questions below