Xiaomi Mi 11 vs OnePlus 9

Here we compared two flagship smartphones: the 6.81-inch Xiaomi Mi 11 (with Qualcomm Snapdragon 888 5G) that was released on December 28, 2020, against the OnePlus 9, which is powered by the same chip and came out 3 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 Mi 11
  • 28% higher pixel density (515 vs 402 PPI)
  • Optical image stabilization
  • Delivers 13% higher maximum brightness (919 against 816 nits)
  • Reverse charging feature
  • Has a built-in infrared port
Reasons to consider the OnePlus 9
  • Shows 8% longer battery life (28:34 vs 26:20 hours)
  • Supports Dolby Atmos sound technology

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

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Price

Tests and specifications

Comparison table of technical specifications and tests
Phone:
vs

Display

Type AMOLED AMOLED
Size 6.81 inches 6.55 inches
Resolution 1440 x 3200 pixels 1080 x 2400 pixels
Aspect ratio 20:9 20:9
PPI 515 ppi 402 ppi
Refresh rate 120 Hz 120 Hz
HDR support Yes, HDR10+ Yes, HDR10+
Screen protection Gorilla Glass Victus Corning Gorilla Glass 5
Screen-to-body ratio 91.4% 87.6%
Display features - DCI-P3
- Always-On Display
- DC Dimming
- DCI-P3
- Always-On Display
- DC Dimming
Display tests
RGB color space - 98.9%
PWM - 323 Hz
Response time - 13 ms
Contrast - ∞ Infinity
Max. Brightness
Mi 11 +13%
919 nits
816 nits
Sources: NotebookCheck [3]

Design and build

Height 164.3 mm (6.47 inches) 160 mm (6.3 inches)
Width 74.6 mm (2.94 inches) 74.2 mm (2.92 inches)
Thickness 8.1 mm (0.32 inches) 8.7 mm (0.34 inches)
Weight 196 gramm (6.91 oz) 192 gramm (6.77 oz)
Waterproof No No
Rear material Glass Glass
Frame material Metal Plastic
Colors White, Black, Blue, Green, Purple Black, Blue, Purple
Fingerprint scanner Yes, in-display Yes, in-display
Screen-to-body ratio
Mi 11 +4%
91.4%
87.6%

Performance

Tests of Xiaomi Mi 11 and OnePlus 9 in the benchmarks
SoC
Chipset Qualcomm Snapdragon 888 5G Qualcomm Snapdragon 888 5G
Max. clock 2840 MHz 2840 MHz
CPU cores 8 (1 + 3 + 4) 8 (1 + 3 + 4)
Architecture - 4 cores at 1.8 GHz: Kryo 680 Silver (Cortex-A55)
- 3 cores at 2.42 GHz: Kryo 680 Gold (Cortex-A78)
- 1 core at 2.84 GHz: Kryo 680 Prime (Cortex-X1)
- 4 cores at 1.8 GHz: Kryo 680 Silver (Cortex-A55)
- 3 cores at 2.42 GHz: Kryo 680 Gold (Cortex-A78)
- 1 core at 2.84 GHz: Kryo 680 Prime (Cortex-X1)
L3 cache 4 MB 4 MB
Lithography process 5 nanometers 5 nanometers
Graphics Adreno 660 Adreno 660
GPU clock 840 MHz 840 MHz
FLOPS ~1720 GFLOPS ~1720 GFLOPS
Memory
RAM size 8, 12 GB 8, 12 GB
Memory type LPDDR5 LPDDR5
Memory clock 2750 MHz 2750 MHz
Channels 2 4
Storage
Storage size 128, 256 GB 128, 256 GB
Storage type UFS 3.1 UFS 3.1
Memory card No No

Benchmarks

Geekbench 5 (Single-Core)
1084
OnePlus 9 +4%
1129
Geekbench 5 (Multi-Core)
3471
OnePlus 9 +4%
3597
AnTuTu Benchmark 9
Mi 11 +4%
813294
779192
CPU 203595 200022
GPU 315180 313671
Memory 133562 124703
UX 163691 143596
Total score 813294 779192
3DMark Wild Life Performance
5290
OnePlus 9 +9%
5762
Stability 92% 55%
Graphics test 31 FPS 34 FPS
Graphics score 5290 5762
PCMark 3.0 score 12813 12293
Best Smartphones in AnTuTu 9 (39th and 58th place)
Sources: 3DMark [3], [4]

Software

Operating system Android 11 (Can be upgraded to Android 12) Android 11 (Can be upgraded to Android 12)
ROM MIUI 13 Oxygen OS 12
OS size - 35 GB

Battery

Specifications
Capacity 4600 mAh 4500 mAh
Charge power 55 W 65 W
Battery type Li-Po Li-Po
Replaceable No No
Wireless charging Yes (50 W) Yes (15 W)
Reverse charging Yes, (wireless) No
Fast charging Yes (83% in 30 min) Yes (100% in 29 min)
Full charging time 0:50 hr 0:29 hr
Battery life tests
Web browsing 08:21 hr 10:27 hr
Watching video 10:58 hr 12:25 hr
Gaming 04:36 hr 04:06 hr
Standby 98 hr 92 hr
General battery life
26:20 hr
OnePlus 9 +8%
28:34 hr

Camera

Specs and camera test of smartphones
Main camera
Matrix 108 megapixels 48 megapixels
Image resolution 12032 x 9204 8000 x 6000
Zoom Digital Digital
Flash LED Dual LED
Stabilization Optical Digital
8K video recording Up to 30FPS Up to 30FPS
4K video recording Up to 60FPS Up to 120FPS
1080p video recording Up to 60FPS Up to 60FPS
Slow motion 240 FPS (1080p) 240 FPS (1080p)
Angle of widest lens 123° 140°
Lenses 3 (108 MP + 13 MP + 5 MP) 3 (48 MP + 50 MP + 2 MP)
Wide (main) lens - 108 MP
- Aperture: f/1.9
- Focal length: 26 mm
- Pixel size: 0.8 micron
- Sensor: 1/1.33", Samsung Bright S5KHMX (ISOCELL Plus CMOS)
- Phase autofocus
- Optical stabilization
- 48 MP
- Aperture: f/1.8
- Focal length: 23 mm
- Pixel size: 1.12 micron
- Sensor: 1/1.43", Sony IMX689 (Exmor-RS CMOS)
- Phase autofocus
Ultra-wide lens - 13 MP
- Aperture: f/2.4
- Pixel size: 1.12 micron
- Sensor: 1/3.06", Omnivision OV13B10
- 50 MP
- Aperture: f/2.2
- Focal length: 14 mm
- Pixel size: 1 micron
- Sensor: 1/1.56", Sony IMX766 (Exmor-RS CMOS)
- Phase autofocus
Monochrome lens - - 2 MP
- Aperture: f/2.4
Macro lens - 5 MP
- Aperture: f/2.4
- Pixel size: 1.12 micron
- Sensor: 1/5", Samsung S5K5E9 (CMOS)
-
Camera features - Bokeh mode
- Pro mode
- RAW support
- Bokeh mode
- Pro mode
- RAW support
Samples Photo samples of Xiaomi Mi 11 from DxOMark Photo samples of OnePlus 9 from DxOMark
Selfie camera
Megapixels 20 megapixels 16 megapixels
Image resolution 5380 x 3620 4920 x 3264
Aperture f/2.3 f/2.0
Focal length 27 mm -
Pixel size 0.8 microns 1 microns
Sensor type ISOCELL CMOS Exmor-RS CMOS
Sensor size 1/3.4" 1/3.06"
Video resolution 1080p (Full HD) at 60 FPS 1080p (Full HD) at 30 FPS

DxOMark camera tests

Photo quality
Mi 11 +3%
127
123
Video quality
Mi 11 +3%
107
104
Generic camera score
Mi 11 +4%
120
115

Connectivity

Wi-Fi standard Wi-Fi 6 (802.11 a/b/g/n/ac/ax) Wi-Fi 6 (802.11 a/b/g/n/ac/ax)
Wi-Fi features - Dual Band
- Wi-Fi MiMO
- Wi-Fi Direct
- Wi-Fi Hotspot
- Wi-Fi Display
- Dual Band
- Wi-Fi Direct
- Wi-Fi Hotspot
- Wi-Fi Display
Bluetooth version 5.2 5.2
Bluetooth features LE, A2DP LE, 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, QZSS, NAVIC GPS, GLONASS, Beidou, Galileo, SBAS
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* 24 20
5G support Yes Yes

Sound

Speakers Stereo Stereo
Headphone audio jack No No
FM radio No No
Dolby Atmos No Yes
Speakers test
Max. loudness
n/a
83 dB

Other

Category Flagship Flagship
Announced December 2020 March 2021
Release date January 2021 March 2021
Sensors - Hall-effect sensor
- Barometer
- Proximity sensor
- Gyroscope
- Accelerometer
- Ambient light sensor
- Compass
- Fingerprint
- Barometer
- 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 display, camera, and design are more important to you, then choose the Xiaomi Mi 11. But if the sound is more of a priority – go for the OnePlus 9.

Cast your vote

So, which phone would you choose?
78 (43.3%)
102 (56.7%)
Total votes: 180

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