Xiaomi Mi 9 vs OnePlus 7

Here we compared two flagship smartphones: the 6.39-inch Xiaomi Mi 9 (with Qualcomm Snapdragon 855) that was released on February 20, 2019, against the OnePlus 7, 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 9
  • Supports wireless charging up to 20W
  • Has an ultra-wide angle camera lens
  • Slow-motion recording at 960FPS
  • Has a built-in infrared port
Reasons to consider the OnePlus 7
  • Shows 19% longer battery life (30:28 vs 25:40 hours)
  • Optical image stabilization
  • Comes with 400 mAh larger battery capacity: 3700 vs 3300 mAh
  • Stereo speakers
  • More recent OS version: Android 12 versus 11
  • Faster storage type - UFS 3.0 versus UFS 2.1
  • Supports Dolby Atmos sound technology
  • 17% faster in single-core GeekBench 5 test: 719 and 615 points

Review

Display
Screen quality, color accuracy, brightness
64
Performance
CPU/GPU performance in apps and games
48
Battery
Battery life, charging type and speed
65
Camera
Photo and video recording quality
69
Connectivity
Networks, ports, data transmission
77
NanoReview score
Final comparison evaluation
61

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
Phone:
vs

Display

Type AMOLED Super AMOLED
Size 6.39 inches 6.41 inches
Resolution 1080 x 2340 pixels 1080 x 2340 pixels
Aspect ratio 19.5:9 19.5:9
PPI 403 ppi 402 ppi
Refresh rate 60 Hz 60 Hz
Max rated brightness 600 nits 800 nits
HDR support Yes, HDR10 Yes, HDR10
Screen protection Corning Gorilla Glass 6 Corning Gorilla Glass 6
Screen-to-body ratio 85.2% 85.5%
Display features - Always-On Display
- DC Dimming
- DCI-P3
- Always-On Display
- DC Dimming
Display tests
RGB color space 95.4% 99.7%
PWM 245 Hz 200 Hz
Response time 4.2 ms 7 ms
Contrast ∞ Infinity ∞ Infinity
Peak brightness test (auto)
617 nits
OnePlus 7 +3%
638 nits
Sources: NotebookCheck [3], [4]

Design and build

Height 157.5 mm (6.2 inches) 157.7 mm (6.21 inches)
Width 74.6 mm (2.94 inches) 74.8 mm (2.94 inches)
Thickness 7.6 mm (0.3 inches) 8.2 mm (0.32 inches)
Weight 173 gramm (6.1 oz) 182 gramm (6.42 oz)
Waterproof No No
Rear material Glass Glass
Frame material Metal Metal
Colors Black, Blue, Purple Gray, Red
Fingerprint scanner Yes, in-display Yes, in-display
Screen-to-body ratio
85.2%
85.5%

Performance

Tests of Xiaomi Mi 9 and OnePlus 7 in the benchmarks
SoC
Chipset Qualcomm Snapdragon 855 Qualcomm Snapdragon 855
Max. clock 2840 MHz 2840 MHz
CPU cores 8 (1 + 3 + 4) 8 (1 + 3 + 4)
Architecture - 4 cores at 1.8 GHz: Cortex-A55 (Kryo 485 Silver)
- 3 cores at 2.42 GHz: Cortex-A76 (Kryo 485 Gold)
- 1 core at 2.84 GHz: Cortex-A76 (Kryo 485 Gold)
- 4 cores at 1.8 GHz: Cortex-A55 (Kryo 485 Silver)
- 3 cores at 2.42 GHz: Cortex-A76 (Kryo 485 Gold)
- 1 core at 2.84 GHz: Cortex-A76 (Kryo 485 Gold)
L3 cache 2 MB 2 MB
Lithography process 7 nanometers 7 nanometers
Graphics Adreno 640 Adreno 640
GPU clock 585 MHz 585 MHz
FLOPS ~899 GFLOPS ~899 GFLOPS
Memory
RAM size 6 GB 6, 8 GB
Memory type LPDDR4X LPDDR4X
Memory clock 2133 MHz 2133 MHz
Channels 2 2
Storage
Storage size 128 GB 128, 256 GB
Storage type UFS 2.1 UFS 3.0
Memory card No No

Benchmarks

Geekbench 5 (Single-Core)
615
OnePlus 7 +17%
719
Geekbench 5 (Multi-Core)
2370
OnePlus 7 +12%
2661
AnTuTu Benchmark 9
506829
OnePlus 7 +4%
527657
CPU 145198 146977
GPU 179503 197376
Memory 76010 80086
UX 109413 105341
Total score 506829 527657
3DMark Wild Life Performance
3071
3079
Stability 92% 98%
Graphics test 18 FPS 18 FPS
Graphics score 3071 3079
PCMark 3.0 score 10519 9724
Sources: 3DMark [3], [4]

Software

Operating system Android 9.0 (Can be upgraded to Android 11) Android 9.0 (Can be upgraded to Android 12)
ROM MIUI 12.0.1 OxygenOS 12.1
OS size 13.5 GB 16 GB

Battery

Specifications
Capacity 3300 mAh 3700 mAh
Charge power 27 W 20 W
Battery type Li-Po Li-Po
Replaceable No No
Wireless charging Yes (20 W) No
Reverse charging No No
Fast charging Yes, Quick Charge 4 (50% in 30 min) Yes, Warp Charge (48% in 30 min)
Full charging time 1:30 hr 1:25 hr
Battery life tests
Web browsing 07:01 hr 10:24 hr
Watching video 14:57 hr 14:54 hr
Gaming 03:32 hr 04:13 hr
Standby 84 hr 96 hr
General battery life
25:40 hr
OnePlus 7 +19%
30:28 hr

Camera

Specs and camera test of smartphones
Main camera
Matrix 48 megapixels 48 megapixels
Image resolution 8000 x 6000 8000 x 6000
Zoom Optical, 2x Optical
Flash Dual LED -
Stabilization Digital Optical
8K video recording No No
4K video recording Up to 60FPS Up to 60FPS
1080p video recording Up to 60FPS Up to 240FPS
Slow motion 960 FPS (1080p) 480 FPS (720p)
Angle of widest lens 117° -
Lenses 3 (48 MP + 12 MP + 16 MP) 2 (48 MP + 5 MP)
Wide (main) lens - 48 MP
- Aperture: f/1.8
- Focal length: 27 mm
- Pixel size: 0.8 micron
- Sensor: 1/2", Sony IMX586 (Exmor-RS CMOS)
- Laser autofocus
- 48 MP
- Aperture: f/1.7
- Pixel size: 0.8 micron
- Sensor: 1/2", Sony IMX586 (Exmor-RS CMOS)
- Phase autofocus
- Optical stabilization
Telephoto lens - 12 MP
- Aperture: f/2.2
- Focal length: 54 mm
- Pixel size: 1 micron
- Sensor: 1/3.6", Samsung S5K3M5 (ISOCELL CMOS)
- Phase autofocus
-
Ultra-wide lens - 16 MP
- Aperture: f/2.2
- Focal length: 13 mm
- Pixel size: 1 micron
- Sensor: 1/3.0", Sony IMX481 (BSI CMOS)
- Phase autofocus
-
Depth lens - - 5 MP
- Aperture: f/2.4
- Pixel size: 1.12 micron
- Sensor: 1/5", GalaxyCore GC5035 (CMOS)
Camera features - Bokeh mode
- Pro mode
- RAW support
- Bokeh mode
- Pro mode
- RAW support
Samples Photo samples of Xiaomi Mi 9 from DxOMark -
Selfie camera
Megapixels 20 megapixels 16 megapixels
Image resolution 5184 x 3880 4608 x 3456
Aperture f/2.0 f/2.0
Focal length 18 mm 25 mm
Pixel size 0.9 microns 1 microns
Sensor type CMOS CMOS
Sensor size 1/3" 1/3.1"
Video resolution 1080p (Full HD) at 30 FPS 1080p (Full HD) at 30 FPS

DxOMark camera tests

Photo quality
112
n/a
Video quality
99
n/a
Generic camera score
107
n/a

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
Bluetooth version 5 5
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
- USB-Host mode
- OTG
- Charging
- USB-Storage mode
- OTG
GPS GPS, GLONASS, Beidou, Galileo 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* 20 16
5G support No No

Sound

Speakers Mono Stereo
Headphone audio jack No No
FM radio No No
Dolby Atmos No Yes
Speakers test
Max. loudness
Mi 9 +2%
87.1 dB
85.6 dB

Other

Category Flagship Flagship
Announced February 2019 May 2019
Release date April 2019 June 2019
SAR (head) 1.389 W/kg 1.166 W/kg
SAR (body) 0.99 W/kg 1.382 W/kg
Sensors - Hall-effect sensor
- Barometer
- 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 OnePlus 7. It has a better performance, software, battery life, and sound.

Cast your vote

So, which phone would you choose?
25 (44.6%)
31 (55.4%)
Total votes: 56

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