Home > Smartphone comparison > Mi 9 vs Pixel 3a – which one to choose?

Xiaomi Mi 9 vs Google Pixel 3a

Here we compared two smartphones: the 6.39-inch Xiaomi Mi 9 (with Qualcomm Snapdragon 855) that was released on February 20, 2019, against the Google Pixel 3a, which is powered by Qualcomm Snapdragon 670 and came out 2 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
  • 2.4x better performance in AnTuTu Benchmark (498K versus 209K)
  • Has a 0.79 inch larger screen size
  • The rear camera has a 2x optical zoom
  • Supports wireless charging up to 20W
  • Thinner bezels – 10.2% more screen real estate
  • Slow-motion recording at 960FPS
  • Comes with 300 mAh larger battery capacity: 3300 vs 3000 mAh
  • Has 50% more RAM: 6GB versus 4GB
  • Has an ultra-wide angle camera lens
  • Has 2 SIM card slots
  • Has a built-in infrared port
Reasons to consider the Google Pixel 3a
  • Optical image stabilization
  • Stereo speakers
  • Weighs 26 grams less
  • Includes a 3.5 mm headphone audio jack port

Review

Display
Screen quality, color accuracy, brightness
67
Performance
CPU/GPU performance in apps and games
63
Battery
Battery life, charging type and speed
77
Camera
Photo and video recording quality
69
Connectivity
Networks, ports, data transmission
79
NanoReview score
Final comparison evaluation
67

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 OLED
Size 6.39 inches 5.6 inches
Resolution 1080 x 2340 pixels 1080 x 2220 pixels
Aspect ratio 19.5:9 18.5:9
PPI 403 ppi 441 ppi
Refresh rate 60 Hz 60 Hz
HDR support Yes, HDR10 No
Screen protection Corning Gorilla Glass 6 Dragontrail
Screen-to-body ratio 85.2% 75%
Display features - Always-On Display
- DC Dimming
- Always-On Display
Display tests
RGB color space 95.4% -
PWM 245 Hz -
Response time 4.2 ms -
Contrast ∞ Infinity -
Max. Brightness
615 nits
n/a
Sources: NotebookCheck [1]

Design and build

Height 157.5 mm (6.2 inches) 151.3 mm (5.96 inches)
Width 74.6 mm (2.94 inches) 70.1 mm (2.76 inches)
Thickness 7.6 mm (0.3 inches) 8.2 mm (0.32 inches)
Weight 173 gramm (6.1 oz) 147 gramm (5.19 oz)
Waterproof No No
Rear material Glass Plastic
Frame material Metal Plastic
Colors Black, Blue, Purple White, Black, Purple
Fingerprint scanner Yes, in-display Yes, rear
Screen-to-body ratio
Mi 9 +14%
85.2%
75%

Performance

Tests of Xiaomi Mi 9 and Google Pixel 3a in the benchmarks
SoC
Chipset Qualcomm Snapdragon 855 Qualcomm Snapdragon 670
Max. clock 2840 MHz 2000 MHz
CPU cores 8 (1 + 3 + 4) 8 (2 + 6)
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)
- 6 cores at 1.7 GHz: Kryo 360 Silver (Cortex-A55)
- 2 cores at 2 GHz: Kryo 360 Gold (Cortex-A75)
L3 cache 2 MB -
Lithography process 7 nanometers 10 nanometers
Graphics Adreno 640 Adreno 615
GPU clock 585 MHz 700 MHz
FLOPS ~899 GFLOPS ~350 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 No No

Benchmarks

Geekbench 5 (Single-Core)
Mi 9 +77%
618
350
Geekbench 5 (Multi-Core)
Mi 9 +72%
2380
1380
AnTuTu Benchmark 9
Mi 9 +138%
498853
209985

Software

Operating system Android 9.0 (Can be upgraded to Android 10) Android 9.0 (Can be upgraded to Android 10)
ROM MIUI 12.0.1 -
OS size 13.5 GB -

Battery

Specifications
Capacity 3300 mAh 3000 mAh
Charge power 27 W 18 W
Battery type Li-Po Li-Ion
Replaceable No No
Wireless charging Yes (20 W) No
Reverse charging No No
Fast charging Yes, Quick Charge 4 (50% in 30 min) Yes, Quick Charge 4.0 (50% in 30 min)
Full charging time 1:30 hr 1:20 hr

Battery life tests

Web browsing (Wi-Fi)
10:09 hr
n/a
Watching videos (Player)
19:02 hr
n/a
Talk (3G)
23:32 hr
n/a

Camera

Specs and camera test of smartphones
Main camera
Matrix 48 megapixels 12.2 megapixels
Image resolution 8000 x 6000 4032 x 3024
Zoom Optical, 2x Digital
Flash Dual LED Dual LED
Stabilization Digital Optical
8K video recording No No
4K video recording Up to 60FPS Up to 30FPS
1080p video recording Up to 240FPS Up to 120FPS
Slow motion 960 FPS (1080p) 240 FPS (720p)
Angle of widest lens 117° -
Lenses 3 (48 MP + 12 MP + 16 MP) 1 (12.2 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
- 12.2 MP
- Aperture: f/1.8
- Focal length: 28 mm
- Pixel size: 1.4 micron
- Sensor: 1/2.55", Sony IMX363 (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
-
Camera features - Bokeh mode
- Pro mode
- RAW support
- Bokeh mode
- Pro mode
Samples Photo samples of Xiaomi Mi 9 from DxOMark Photo samples of Google Pixel 3a from DxOMark
Selfie camera
Megapixels 20 megapixels 8 megapixels
Image resolution 5184 x 3880 3264 x 2448
Aperture f/2.0 f/2.0
Focal length 18 mm 24 mm
Pixel size 0.9 microns 1.12 microns
Sensor type CMOS BSI CMOS
Sensor size 1/3" 1/2.8"
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 2
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 1
Type of SIM card Nano Nano
Multi SIM mode Standby Standby
eSIM support* No No
Hybrid slot No No
LTE Cat* 20 11
5G support No No

Sound

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

Other

Category Flagship Mid-range
Announced February 2019 May 2019
Release date April 2019 May 2019
Launch price ~ 487 USD ~ 337 USD
SAR (head) 1.389 W/kg 0.39 W/kg
SAR (body) 0.99 W/kg 0.9 W/kg
Sensors - Hall-effect sensor
- Barometer
- Proximity sensor
- Gyroscope
- Accelerometer
- Ambient light sensor
- Compass
- Fingerprint
- Barometer
- Proximity sensor
- Gyroscope
- Accelerometer
- Compass
- Fingerprint
*Disclaimer! NFC, GSM network support, and some other specs can be different depending on the country.

Conclusion

After analyzing all the data, we think that the Xiaomi Mi 9 is definitely a better buy.

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