Home > Smartphone comparison > Redmi Note 9 Pro vs Galaxy M21 – which one to choose?

Xiaomi Redmi Note 9 Pro vs Samsung Galaxy M21

Here we compared two mid-range smartphones: the 6.67-inch Xiaomi Redmi Note 9 Pro (with Qualcomm Snapdragon 720G) that was released on April 30, 2020, against the Samsung Galaxy M21, which is powered by Exynos 7 Octa 9611 and came out 2 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 Xiaomi Redmi Note 9 Pro
  • 52% better performance in AnTuTu Benchmark (270K versus 178K)
  • Slow-motion recording at 960FPS
  • Has 50% more RAM: 6GB versus 4GB
  • More energy-efficient CPU – Snapdragon 720G
  • 62% faster in single-core GeekBench 5 test: 559 and 346 points
  • Has a built-in infrared port
Reasons to consider the Samsung Galaxy M21
  • Comes with 980 mAh larger battery capacity: 6000 vs 5020 mAh
  • Super AMOLED display (versus competitor's IPS LCD)
  • Supports Dolby Atmos sound technology
  • Weighs 21 grams less

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

Display

Type IPS LCD Super AMOLED
Size 6.67 inches 6.4 inches
Resolution 1080 x 2400 pixels 1080 x 2340 pixels
Aspect ratio 20:9 19.5:9
PPI 395 ppi 403 ppi
Refresh rate 60 Hz 60 Hz
HDR support Yes, HDR10 No
Screen protection Corning Gorilla Glass 5 Corning Gorilla Glass 3
Screen-to-body ratio 84.5% 84.2%
Display features - - Always-On Display
Display tests
RGB color space 99.8% 141.3%
PWM 2404 Hz 215 Hz
Response time 35.2 ms 9 ms
Contrast 1649:1 ∞ Infinity
Max. Brightness
611 nits
613 nits
Sources: NotebookCheck [1], [2]

Design and build

Height 165.8 mm (6.53 inches) 159 mm (6.26 inches)
Width 76.7 mm (3.02 inches) 75.1 mm (2.96 inches)
Thickness 8.8 mm (0.35 inches) 8.9 mm (0.35 inches)
Weight 209 gramm (7.37 oz) 188 gramm (6.63 oz)
Waterproof No No
Rear material Glass Plastic
Frame material Plastic Plastic
Colors White, Gray, Green Black, Blue, Green
Fingerprint scanner Yes, in home button Yes, rear
Screen-to-body ratio

Performance

Tests of Xiaomi Redmi Note 9 Pro and Samsung Galaxy M21 in the benchmarks
SoC
Chipset Qualcomm Snapdragon 720G Samsung Exynos 7 Octa 9611
Max. clock 2300 MHz 2300 MHz
CPU cores 8 (2 + 6) 8 (4 + 4)
Architecture - 6 cores at 1.8 GHz: Kryo 465 Silver (Cortex-A55)
- 2 cores at 2.3 GHz: Kryo 465 Gold (Cortex-A76)
- 4 cores at 1.7 GHz: Cortex-A53
- 4 cores at 2.3 GHz: Cortex-A73
L3 cache 1 MB -
Lithography process 8 nanometers 10 nanometers
Graphics Adreno 618 Mali-G72 MP3
GPU clock 750 MHz 850 MHz
FLOPS ~435 GFLOPS ~259 GFLOPS
Memory
RAM size 6 GB 4 GB
Memory type LPDDR4X LPDDR4X
Memory clock 2133 MHz 1866 MHz
Channels 2 2
Storage
Storage size 128 GB 64 GB
Storage type UFS 2.1 UFS 2.1
Memory card MicroSD MicroSD
Memory card max. size Up to 512 GB Up to 512 GB

Benchmarks

Geekbench 5 (Single-Core)
Geekbench 5 (Multi-Core)
1728
1329
AnTuTu Benchmark 7
AnTuTu Benchmark 8
270623
178436

Software

Operating system Android 10.0 (Can be upgraded to Android 11) Android 10.0 (Can be upgraded to Android 11.0)
ROM MIUI 12.5 One UI 3.1 Core
OS size 18.9 GB 14.5 GB

Battery

Specifications
Capacity 5020 mAh 6000 mAh
Charge power 30 W 15 W
Battery type Li-Po Li-Ion
Replaceable No No
Wireless charging No No
Reverse charging No No
Fast charging Yes (50% in 30 min) Yes, Samsung Adaptive Fast Charge (25% in 30 min)
Full charging time 1:20 hr 2:35 hr

Battery life tests

Web browsing (Wi-Fi)
Watching videos (Player)
Talk (3G)

Camera

Specs and camera test of smartphones
Main camera
Matrix 64 megapixels 48 megapixels
Image resolution 9248 x 6920 8000 x 6000
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 60FPS Up to 30FPS
Slow motion 960 FPS (720p) 240 FPS (720p)
Angle of widest lens 119° 123°
Lenses 4 (64 MP + 8 MP + 5 MP + 2 MP) 3 (48 MP + 8 MP + 5 MP)
Wide (main) lens - 64 MP
- Aperture: f/1.9
- Focal length: 26 mm
- Pixel size: 0.8 micron
- Sensor: 1/1.72", Samsung Bright S5KGW1 (ISOCELL CMOS)
- Phase autofocus
- 48 MP
- Aperture: f/2.0
- Focal length: 26 mm
- Pixel size: 0.8 micron
- Sensor: 1/2.0", Samsung S5KGM2 (ISOCELL CMOS)
- Phase autofocus
Ultra-wide lens - 8 MP
- Aperture: f/2.2
- Focal length: 13 mm
- Pixel size: 1.12 micron
- Sensor: 1/4.0", GalaxyCore GC8034 (BSI CMOS)
- 8 MP
- Aperture: f/2.2
- Focal length: 12 mm
- Pixel size: 1.12 micron
- Sensor: 1/4.0" (CMOS)
Macro lens - 5 MP
- Aperture: f/2.4
- Pixel size: 1.12 micron
- Sensor: 1/5.0", Samsung S5K5E9 (ISOCELL CMOS)
-
Depth lens - 2 MP
- Aperture: f/2.4
- Pixel size: 1.75 micron
- Sensor: 1/5", GalaxyCore GC02M1 (CMOS)
- 5 MP
- Aperture: f/2.2
- Focal length: 25 mm
- Pixel size: 1.12 micron
- Sensor: 1/5.0" (CMOS)
Camera features - Bokeh mode
- Pro mode
- Bokeh mode
- Pro mode
Selfie camera
Megapixels 16 megapixels 20 megapixels
Image resolution 4920 x 3264 5184 x 3888
Aperture f/2.48 f/2.0
Focal length - 26 mm
Pixel size 1 microns -
Sensor type CMOS CMOS
Sensor size 1/3.1" -
Video resolution 1080p (Full HD) 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
Bluetooth version 5 5
Bluetooth features LE, HID, 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, NAVIC GPS, GLONASS, Beidou, Galileo
NFC* Yes Yes
Infrared port Yes 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 12
5G support No No

Sound

Speakers Mono Mono
Headphone audio jack Yes Yes
FM radio Yes Yes
Dolby Atmos No Yes
Speakers test
Max. loudness
87.1 dB
83.8 dB

Other

Category Mid-range Mid-range
Announced April 2020 March 2020
Release date May 2020 March 2020
Launch price ~ 187 USD ~ 200 USD
SAR (head) 0.66 W/kg 0.492 W/kg
SAR (body) 1.02 W/kg 1.13 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 performance and camera are more important to you, then choose the Xiaomi Redmi Note 9 Pro. But if the display and sound are more of a priority – go for the Samsung Galaxy M21.

Cast your vote

So, which phone would you choose?
87 (36.3%)
153 (63.7%)
Total votes: 240

User opinions

You can share your opinion or ask a question in the comments below