Home > Smartphone comparison > Redmi Note 9 vs Galaxy M31 – which one to choose?

Xiaomi Redmi Note 9 vs Samsung Galaxy M31

Here we compared two mid-range smartphones: the 6.53-inch Xiaomi Redmi Note 9 (with MediaTek Helio G85) that was released on April 30, 2020, against the Samsung Galaxy M31, 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
  • 13% better performance in AnTuTu Benchmark (211K versus 187K)
  • Reverse charging feature
  • 13% faster in single-core GeekBench 5 test: 371 and 327 points
  • Has a built-in infrared port
Reasons to consider the Samsung Galaxy M31
  • Comes with 980 mAh larger battery capacity: 6000 vs 5020 mAh
  • Delivers 32% higher maximum brightness (620 against 471 nits)
  • Ability to record video in 4K resolution
  • More recent OS version: Android 11 versus 10
  • Slow-motion recording at 240FPS
  • Super AMOLED display (versus competitor's IPS LCD)
  • The front-facing camera can record video at 4K

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 6.53 inches 6.4 inches
Resolution 1080 x 2340 pixels 1080 x 2340 pixels
Aspect ratio 19.5:9 19.5:9
PPI 395 ppi 403 ppi
Refresh rate 60 Hz 60 Hz
HDR support No Yes, HDR10
Screen protection Corning Gorilla Glass 5 Corning Gorilla Glass 3
Screen-to-body ratio 83.5% 84%
Display features - - Always-On Display
Display tests
RGB color space 97.7% 142%
PWM Not detected 208 Hz
Response time 32.2 ms 8.5 ms
Contrast 4608:1 ∞ Infinity
Max. Brightness
471 nits
Galaxy M31 +32%
620 nits
Sources: NotebookCheck [1], [2]

Design and build

Height 162.3 mm (6.39 inches) 159.2 mm (6.27 inches)
Width 77.2 mm (3.04 inches) 75.1 mm (2.96 inches)
Thickness 8.9 mm (0.35 inches) 8.9 mm (0.35 inches)
Weight 199 gramm (7.02 oz) 191 gramm (6.74 oz)
Waterproof No No
Rear material Plastic Plastic
Frame material Plastic Plastic
Colors White, Gray, Green Black, Blue, Red
Fingerprint scanner Yes, rear Yes, rear
Screen-to-body ratio
83.5%
84%

Performance

Tests of Xiaomi Redmi Note 9 and Samsung Galaxy M31 in the benchmarks
SoC
Chipset MediaTek Helio G85 Samsung Exynos 7 Octa 9611
Max. clock 2000 MHz 2300 MHz
CPU cores 8 (2 + 6) 8 (4 + 4)
Architecture - 6 cores at 1.8 GHz: Cortex-A55
- 2 cores at 2 GHz: Cortex-A75
- 4 cores at 1.7 GHz: Cortex-A53
- 4 cores at 2.3 GHz: Cortex-A73
Lithography process 12 nanometers 10 nanometers
Graphics Mali-G52 MP2 Mali-G72 MP3
GPU clock 1000 MHz 850 MHz
FLOPS ~54 GFLOPS ~259 GFLOPS
Memory
RAM size 3, 4 GB 6 GB
Memory type LPDDR4X LPDDR4X
Memory clock 2133 MHz 1866 MHz
Channels 2 2
Storage
Storage size 64, 128 GB 128 GB
Storage type eMMC 5.1 UFS 2.1
Memory card MicroSD MicroSD
Memory card max. size Up to 512 GB Up to 512 GB

Benchmarks

Geekbench 5 (Single-Core)
371
Geekbench 5 (Multi-Core)
1311
1262
AnTuTu Benchmark 7
AnTuTu Benchmark 8
211265
187485

Software

Operating system Android 10 Android 10 (Can be upgraded to Android 11)
ROM MIUI 12 One UI 3.1
OS size 16.5 GB 15 GB

Battery

Specifications
Capacity 5020 mAh 6000 mAh
Charge power 18 W 15 W
Battery type Li-Po Li-Ion
Replaceable No No
Wireless charging No No
Reverse charging Yes No
Fast charging Yes (50% in 40 min) Yes, Samsung Adaptive Fast Charge (45% in 60 min)
Full charging time 1:30 hr 2:25 hr

Battery life tests

Web browsing (Wi-Fi)
18:00 hr
Watching videos (Player)
18:09 hr
Talk (3G)
34:52 hr

Camera

Specs and camera test of smartphones
Main camera
Matrix 48 megapixels 64 megapixels
Image resolution 8000 x 6000 9248 x 6920
Zoom Digital Digital
Flash LED LED
Stabilization Digital Digital
8K video recording No No
4K video recording No Up to 30FPS
1080p video recording Up to 30FPS Up to 30FPS
Slow motion 120 FPS (720p) 240 FPS (720p)
Angle of widest lens 118° 123°
Lenses 4 (48 MP + 8 MP + 2 MP + 2 MP) 4 (64 MP + 8 MP + 5 MP + 5 MP)
Wide (main) lens - 48 MP
- Aperture: f/1.8
- Focal length: 26 mm
- Pixel size: 0.8 micron
- Sensor: 1/2.0", Samsung S5KGM1 (ISOCELL Plus CMOS)
- Phase autofocus
- 64 MP
- Aperture: f/1.8
- Focal length: 26 mm
- Pixel size: 0.8 micron
- Sensor: 1/1.72", ISOCELL Bright GW1 (ISOCELL CMOS)
- Phase autofocus
Ultra-wide lens - 8 MP
- Aperture: f/2.2
- Pixel size: 1.12 micron
- Sensor: 1/4.0" (CMOS)
- 8 MP
- Aperture: f/2.2
- Focal length: 12 mm
- Pixel size: 1.12 micron
- Sensor: 1/4.0" (CMOS)
Macro lens - 2 MP
- Aperture: f/2.4
- 5 MP
- Aperture: f/2.2
Depth lens - 2 MP
- Aperture: f/2.4
- 5 MP
- Aperture: f/2.2
- Pixel size: 1.12 micron
- Sensor: 1/5.0" (CMOS)
Camera features - Bokeh mode
- Pro mode
- Bokeh mode
- Pro mode
Selfie camera
Megapixels 13 megapixels 32 megapixels
Image resolution 4128 x 3096 6528 x 4896
Aperture f/2.3 f/2.0
Focal length 29 mm 26 mm
Pixel size 1.12 microns 0.8 microns
Sensor type CMOS CMOS
Sensor size 1/3.1" 1/2.8"
Video resolution 1080p (Full HD) при 30 FPS 2160p (4K) при 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 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 GPS, GLONASS, Beidou, Galileo
NFC* 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
92.4 dB
81.7 dB

Other

Category Mid-range Mid-range
Announced April 2020 February 2020
Release date June 2020 March 2020
Launch price ~ 212 USD ~ 250 USD
SAR (head) 0.8 W/kg 0.48 W/kg
SAR (body) 1.14 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

These smartphones have a lot in common, but we would recommend the Samsung Galaxy M31. It has a better display, software, battery life, camera, and sound.

Cast your vote

So, which phone would you choose?
78 (55.3%)
63 (44.7%)
Total votes: 141

User opinions

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