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Xiaomi Redmi Note 9 vs Note 8 2021

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 Xiaomi Redmi Note 8 2021, which is powered by the same chip and came out 13 months after. 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
  • Comes with 1020 mAh larger battery capacity: 5020 vs 4000 mAh
  • Shows 23% longer battery life (125 vs 102 hours)
  • 16% better performance in AnTuTu Benchmark (237K versus 204K)
  • Reverse charging feature
Reasons to consider the Xiaomi Redmi Note 8 2021
  • Delivers 32% higher maximum brightness (608 against 459 nits)
  • Newer Bluetooth version (v5.2)
  • The phone is 1-year and 1-month newer

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 IPS LCD
Size 6.53 inches 6.3 inches
Resolution 1080 x 2340 pixels 1080 x 2340 pixels
Aspect ratio 19.5:9 19.5:9
PPI 395 ppi 409 ppi
Refresh rate 60 Hz 60 Hz
HDR support No No
Screen protection Corning Gorilla Glass 5 Corning Gorilla Glass 5
Screen-to-body ratio 83.5% 81.7%
Display tests
RGB color space 97.7% -
PWM Not detected -
Response time 32.2 ms -
Contrast 4608:1 -
Max. Brightness
459 nits
608 nits
Sources: NotebookCheck [1]

Design and build

Height 162.3 mm (6.39 inches) 158.3 mm (6.23 inches)
Width 77.2 mm (3.04 inches) 75.3 mm (2.96 inches)
Thickness 8.9 mm (0.35 inches) 8.4 mm (0.33 inches)
Weight 199 gramm (7.02 oz) 190 gramm (6.7 oz)
Waterproof No No
Rear material Plastic Glass
Frame material Plastic Plastic
Colors White, Gray, Green White, Black, Blue
Fingerprint scanner Yes, rear Yes, rear
Screen-to-body ratio

Performance

Tests of Xiaomi Redmi Note 9 and Xiaomi Redmi Note 8 2021 in the benchmarks
SoC
Chipset MediaTek Helio G85 MediaTek Helio G85
Max. clock 2000 MHz 2000 MHz
CPU cores 8 (2 + 6) 8 (2 + 6)
Architecture - 6 cores at 1.8 GHz: Cortex-A55
- 2 cores at 2 GHz: Cortex-A75
- 6 cores at 1.8 GHz: Cortex-A55
- 2 cores at 2 GHz: Cortex-A75
Lithography process 12 nanometers 12 nanometers
Graphics Mali-G52 MP2 Mali-G52 MP2
GPU clock 1000 MHz 1000 MHz
FLOPS ~54 GFLOPS ~54 GFLOPS
Memory
RAM size 3, 4 GB 3, 4 GB
Memory type LPDDR4X LPDDR4X
Memory clock 2133 MHz 1866 MHz
Channels 2 2
Storage
Storage size 64, 128 GB 64, 128 GB
Storage type eMMC 5.1 eMMC 5.1
Memory card MicroSD MicroSD
Memory card max. size Up to 512 GB Up to 256 GB

Benchmarks

Geekbench 5 (Single-Core)
Geekbench 5 (Multi-Core)
AnTuTu Benchmark 9
237433

Software

Operating system Android 10 (Can be upgraded to Android 11) Android 11
ROM MIUI 12.5 Enhanced Edition MIUI 12.5
OS size 16.5 GB -

Battery

Specifications
Capacity 5020 mAh 4000 mAh
Charge power 18 W 18 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 (34% in 30 min)
Full charging time 1:30 hr 2:00 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 48 megapixels
Image resolution 8000 x 6000 8000 x 6000
Zoom Digital Digital
Flash LED LED
Stabilization Digital Digital
8K video recording No No
4K video recording No No
1080p video recording Up to 30FPS Up to 30FPS
Slow motion 120 FPS (720p) 120 FPS (720p)
Angle of widest lens 118° 118°
Lenses 4 (48 MP + 8 MP + 2 MP + 2 MP) 4 (48 MP + 8 MP + 2 MP + 2 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
- 48 MP
- Aperture: f/1.8
- Focal length: 26 mm
- Pixel size: 0.8 micron
- Sensor: 1/2" (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: 13 mm
- Pixel size: 1.12 micron
- Sensor: 1/5" (CMOS)
Macro lens - 2 MP
- Aperture: f/2.4
- 2 MP
- Aperture: f/2.4
- Pixel size: 1.75 micron
- Sensor: 1/5" (CMOS)
Depth lens - 2 MP
- Aperture: f/2.4
- 2 MP
- Aperture: f/2.4
- Pixel size: 1.75 micron
- Sensor: 1/5" (CMOS)
Camera features - Bokeh mode
- Pro mode
- Bokeh mode
- Pro mode
Selfie camera
Megapixels 13 megapixels 13 megapixels
Image resolution 4128 x 3096 4224 x 3136
Aperture f/2.3 f/2.0
Focal length 29 mm 28.21 mm
Pixel size 1.12 microns 1.12 microns
Sensor type CMOS CMOS
Sensor size 1/3.1" 1/2.9"
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 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 5.2
Bluetooth features LE, HID, A2DP LE, HID, 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 No
Infrared port Yes Yes
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 7
5G support No No

Sound

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

Other

Category Mid-range Mid-range
Announced April 2020 May 2021
Release date June 2020 May 2021
Launch price ~ 212 USD ~ 200 USD
SAR (head) 0.8 W/kg -
SAR (body) 1.14 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 battery life are more important to you, then choose the Xiaomi Redmi Note 9. But if the display and design are more of a priority – go for the Xiaomi Redmi Note 8 2021.

Cast your vote

So, which phone would you choose?
36 (32.1%)
76 (67.9%)
Total votes: 112

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