Home Phone comparison Samsung Galaxy M21 and Samsung Galaxy S8 - Which is better?

Samsung Galaxy M21 vs Samsung Galaxy S8

45 out 100
Samsung Galaxy M21
VS
44 out 100
Samsung Galaxy S8
Samsung Galaxy M21
Samsung Galaxy S8

Compared 2 smartphones : Samsung Galaxy M21 Manufactured in March, 2020, with display 6.4 with chipsetSamsung Exynos 7 Octa 9611, vs Samsung Galaxy S8, Manufactured in April, 2017 with chipsetSamsung Exynos 9 Octa 8895. 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
  • Larger display: 6.4in
  • Higher battery capacity: 6000mAh vs 3000mAh
Reasons to choose Samsung Galaxy S8
  • Higher pixel density: 570ppi
  • Lighter design: 155g vs 188g
  • Supports newer USB: 3.1 vs 2

Versions

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

Review

Key Specs Samsung Galaxy M21 and Samsung Galaxy S8
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.
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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 S8

Display

Display quality comparison
Type Super AMOLED Super AMOLED
Size 6.4 in 5.8 in
Resolution 1080x2340 pixels 1440x2960 pixels
Aspect ratio 19.5:9 18.5:9
Pixel density 403 ppi 570 ppi
Refresh rate 60 Hz 60 Hz
Adaptive refresh rate No No
Max brightness 630 nits 540 nits
HDR support No Yes HDR10
Screen-to-body ratio 84.2 % 84.2 %
Features Always-On Display Always-On Display
Display test
Peak brightness (auto)
Samsung Galaxy M21
608 nits
Samsung Galaxy S8
614 nits
sRGB gamut141.3 %99.8 %
PWM (Flicker)215 Hz250 Hz
Response time9 ms4.4 ms
Contrast∞ Infinite∞ Infinite
Sources: NotebookCheck [Samsung Galaxy M21], [Samsung Galaxy S8]

Design & Build

Design and ergonomics comparison
Height 159 mm (6.26 in) 148.9 mm (5.86 in)
Width 75.1 mm (2.96 in) 68.1 mm (2.68 in)
Thickness 8.9 mm (0.35 in) 8 mm (0.31 in)
Weight 188 g (6.63 oz) 155 g (5.47 oz)
Water resistance No IP68
Back panel Plastic Glass
Frame Plastic Metal
Colors - Black
- Blue
- Green		 - Black
- Silver
- Gold
- Gray
- Blue
- Red
- Pink
Fingerprint sensor Yes rear Yes rear
Screen-to-body ratio
Samsung Galaxy M21
84.2 %
Samsung Galaxy S8
84.2 %

Performance

Testing Samsung Galaxy M21 and Samsung Galaxy S8 In benchmarks
Processor
Chipset Samsung Exynos 7 Octa 9611 Samsung Exynos 9 Octa 8895
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)		 - 4/1.69 (Cortex-A53)
- 4/2.314 (Exynos M2)
Process Samsung Samsung
Transistor Size 10 nm 10 nm
Neural Processor Yes No
Graphics Mali-G72 MP3 Mali-G71 MP20
GPU Cores 54 320
GPU Frequency 850 MHz 546 MHz
FLOPS 113.8 GFLOPS 375 GFLOPS
GeekBench v6
Geekbench 6 (Single-Core)
Samsung Galaxy M21
514
Samsung Galaxy S8
519
Geekbench 6 (Multi-Core)
Samsung Galaxy M21
1558
Samsung Galaxy S8
1563
Geekbench 6 (Single-Core)514519
Geekbench 6 (Multi-Core)15581563
AnTuTu 10
AnTuTu 10
Samsung Galaxy M21
266455
Samsung Galaxy S8
377103
CPU76468107990
GPU45756116534
Memory7026984213
UX7396268366
NanoReview Score266455377103
3DMark Wild Life
3DMark Wild Life
Samsung Galaxy M21
816
Samsung Galaxy S8
n/a
Max Surface Temp.44.1 °Cn/a
Stability73 %n/a
Graphics Test4 fpsn/a
Graphics Score816n/a
Sources: 3DMark [Samsung Galaxy M21]

Memory

RAM
RAM Size - 4 GB
- 6 GB		 4 GB
Memory Type LPDDR4X LPDDR4X
Memory Frequency 1866 MHz 1794 MHz
Channels 2 2
Storage
Storage Capacity- 64 GB
- 128 GB		64 GB
Storage TypeUFS 2.1UFS 2.1
Memory CardMicroSDMicroSD

Software

OS Android 10.0 (Upgradeable to Android 12.0) Android 7.0 (Upgradeable to Android 9.0)
OS Size 14.5 GB 11.7 GB
UI Skin One Ui 4.1 One UI

Battery

Volume 6000 mAh 3000 mAh
Max Charging Power 15 W 15 W
Battery Type Li-ion Li-ion
Removable No No
Wireless Charging No Yes Qi/PMA
Reverse Charging No No
Fast Charging Yes Samsung Adaptive Fast Charge (25% in 30 min) Yes Samsung Adaptive Fast Charge (40% in 30 min)
Full Charge Time 2:35 h 1:45 h
Battery Life Test
Battery Life
Samsung Galaxy M21
24:03
Samsung Galaxy S8
16:58
Web Browsing10:07 h06:26 h
Video Playback13:59 h10:09 h
Games05:35 h04:05 h
Standby Mode115 h85 h

Main camera

Matrix 48 MP 12 MP
Photo resolution 8000x6000 pixels 4000x3000 pixels
Zoom Digital Digital
Flash LED Dual LED
Stabilization Digital Optical
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 60 fps)
Slow Motion 240 fps (720p) 240 fps (720p)
Wide-angle lens 123 ° n/a
Lenses count Standard: 48 MP
Ultra-wide: 8 MP
Depth: 5 MP		 Standard: 12 MP
Features - Bokeh effect
- Pro mode		 Pro mode
Main lens
Matrix48 MP12 MP
Aperturef/2.0f/1.7
Focal length26 mm26 mm
SensorSamsung S5KGM2Sony IMX333
Sensor size1/2.01/2.55
Pixel size0.8 μm1.4 μm
AutofocusPhase autofocusPhase autofocus
StabilizationDigitalOptical
Ultra-wide lens
Matrix8 MPn/a
Aperturef/2.2n/a
Focal length12 mmn/a
Sensor size1/4.0n/a
Pixel size1.12 μmn/a
StabilizationDigitaln/a
Main camera DxOMark results
Photo quality
Samsung Galaxy M21
n/a
Samsung Galaxy S8
88
Video quality
Samsung Galaxy M21
n/a
Samsung Galaxy S8
88
Overall camera score
Samsung Galaxy M21
n/a
Samsung Galaxy S8
88
Sources: DxOMark [Samsung Galaxy S8]

Front camera

Matrix 20 MP 8 MP
Photo resolution 5184x3888 pixels 3264x2448 pixels
Aperture f/2.0 f/1.7
Focal length 26 mm 25 mm
Sensor CMOS Samsung S5K3H7
Sensor size n/a 1/3.6
Pixel size n/a 1.22 μm
Autofocus No Phase autofocus
Stabilization Digital Digital
Video resolution 1080p (Full HD) at 30 fps 1440p at 30 fps
TOF 3D sensor No No
Selfie camera DxOMark results
Photo quality
Samsung Galaxy M21
n/a
Samsung Galaxy S8
86
Video quality
Samsung Galaxy M21
n/a
Samsung Galaxy S8
107

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
Bluetooth version 5 5
Bluetooth features PBAP/PAB, PAN, OPP, MAP, HSP, HID, HFP, DIP, AVRCP, A2DP PBAP/PAB, PAN, OPP, MAP, LE, HSP, HID, HFP, DIP, AVRCP, A2DP
USB type USB Type-C USB Type-C
USB version 2 3.1
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 SlotNoYes
2G BandsGSM850, GSM900, DCS1800, PCS1900GSM 850, GSM 900, GSM 1800, GSM 1900
3G BandsB1 (2100), B2 (1900), B5(850), B8 (900)HSDPA 850, HSDPA 900, HSDPA 1900, HSDPA 2100
LTE Bands*LTE (B1/B3/B5/B7/B8/B20/B38/B40/B41)LTE (B700/B800/B850/B900/B1700/B1800/B1900/B2100/B2300/B2500/B2600)
LTE category1216
5G SupportNoNo

Sound

Speakers Mono Mono
3.5 mm Jack Yes Yes
FM Radio Yes No
Dolby Atmos Yes Yes
Speaker Test
Max Volume
Samsung Galaxy M21
83.8 dB
Samsung Galaxy S8
82.4 dB

Other

Class Mid-range Flagship
Announced March, 2020 yr March, 2017 yr
Release Date March, 2020 yr April, 2017 yr
Launch Price ($) 210 720
Sensors - Proximity Sensor
- Gyroscope
- Accelerometer
- Ambient Light Sensor
- Compass
- Fingerprint sensor		 - Barometer
- Proximity Sensor
- Gyroscope
- Accelerometer
- Ambient Light Sensor
- Compass
- Fingerprint sensor
* Attention! Config, frequencies, NFC, and other specs may vary by region.

Results

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