Home > Smartphone comparison > Mi 9 Lite vs Galaxy A51 – which one to choose?

Xiaomi Mi 9 Lite vs Samsung Galaxy A51

42 out of 100
Xiaomi Mi 9 Lite
VS
38 out of 100
Samsung Galaxy A51
Xiaomi Mi 9 Lite
Samsung Galaxy A51

Here we compared two mid-range smartphones: the 6.39-inch Xiaomi Mi 9 Lite (with Qualcomm Snapdragon 710) that was released on September 16, 2019, against the Samsung Galaxy A51, which is powered by Exynos 9 Octa 9611 and came out 3 months after. On this page, you will find tests, full specs, strengths, and weaknesses of each of the devices.

Select the amount of RAM to evaluate performance and value for money more precisely
Memory
  1. Differences
  2. Review
  3. Specs
  4. Benchmarks
  5. Battery life
  6. Camera
  7. Comments

Key differences

An overview of the main advantages of each smartphone
Reasons to consider the Xiaomi Mi 9 Lite
  • Shows 29% longer battery life (23:06 vs 17:53 hours)
  • 18% better performance in AnTuTu Benchmark (417K versus 352K)
  • Has 50% more RAM: 6GB versus 4GB
  • Faster storage type - UFS 2.1 versus UFS 2.0
  • 16% faster in single-core GeekBench 6 test: 431 and 372 points
  • Has a built-in infrared port
Reasons to consider the Samsung Galaxy A51
  • More recent OS version: Android 13 versus 11
  • The front-facing camera can record video at 4K
  • Supports Dolby Atmos sound technology

Review

Evaluation of Xiaomi Mi 9 Lite and Samsung Galaxy A51 crucial features
Display
Screen quality, color accuracy, brightness
Camera
Photo and video recording quality
Performance
CPU and memory performance (apps, system)
Gaming
Capabilities for playing modern games
Battery
Battery life, charging type and speed
Connectivity
Networks, ports, data transmission
Scores with a red asterisk (*) are approximate and may change in the future as we gather more data.
NanoReview Score
Final comparison evaluation
Select your primary usage scenario to get a more accurate NanoReview Score
πŸ“± Primary usage:

Value for money (Beta)

To get an accurate value-for-money index, update the default prices with actual prices from your country’s retailers (for the selected memory configs) and press the "Calculate" button.
Currency
6 / 64 GB
VS
4 / 64 GB
78.0
(Good)
Value Index
50.7
(Average)

Tests and specifications

Comparison table of technical specifications and tests
Phone:
Mi 9 Lite
vs
Galaxy A51

Display

Type AMOLED Super AMOLED
Size 6.39 inches 6.5 inches
Resolution 1080 x 2340 pixels 1080 x 2400 pixels
Aspect ratio 19.5:9 20:9
PPI 403 ppi 405 ppi
Refresh rate 60 Hz 60 Hz
Adaptive refresh rate No No
Max rated brightness 430 nits 400 nits
HDR support Yes, HDR10 No
Screen protection Corning Gorilla Glass 5 Corning Gorilla Glass 3
Screen-to-body ratio 85.8% 87.5%
Display features - Always-On Display
- DC Dimming		 - Always-On Display
Display tests
RGB color space 95.8% 98.8%
PWM 240 Hz 242 Hz
Response time 3.4 ms 25 ms
Contrast ∞ Infinity ∞ Infinity
Peak brightness test (auto)
Mi 9 Lite
622 nits
Galaxy A51 +1%
630 nits
Sources: NotebookCheck [3], [4]

Design and build

Height 156.8 mm (6.17 inches) 158.5 mm (6.24 inches)
Width 74.5 mm (2.93 inches) 73.6 mm (2.9 inches)
Thickness 8.7 mm (0.34 inches) 7.9 mm (0.31 inches)
Weight 179 g (6.31 oz) 172 g (6.07 oz)
Waterproof No No
Rear material Glass Plastic
Frame material Metal Plastic
Colors White, Black, Blue White, Black
Fingerprint scanner Yes, in-display Yes, in-display
Screen-to-body ratio
Mi 9 Lite
85.8%
Galaxy A51 +2%
87.5%

Performance

Chipset specifications of Xiaomi Mi 9 Lite and Samsung Galaxy A51
SoC
Chipset Qualcomm Snapdragon 710 Samsung Exynos 9 Octa 9611
Max clock 2200 MHz 2300 MHz
CPU cores 8 (2 + 6) 8 (4 + 4)
Architecture - 6 cores at 1.7 GHz: Kryo 360 Silver (Cortex-A55)
- 2 cores at 2.2 GHz: Kryo 360 Gold (Cortex-A75)		 - 4 cores at 1.7 GHz: Cortex-A53
- 4 cores at 2.3 GHz: Cortex-A73
L3 cache 1 MB -
Manufacturing Samsung Samsung
Lithography process 10 nanometers 10 nanometers
Neural processor (NPU) Hexagon 685 Yes
GPU
Graphics Adreno 616 Mali-G72 MP3
GPU shading units 256 36
GPU clock 500 MHz 850 MHz
FLOPS ~258 GFLOPS ~61.2 GFLOPS

Benchmarks

Benchmark comparison of Xiaomi Mi 9 Lite and Samsung Galaxy A51
Geekbench 6 (Single-Core)
Mi 9 Lite +16%
431
Galaxy A51
372
Geekbench 6 (Multi-Core)
Mi 9 Lite +10%
1320
Galaxy A51
1204
Compute Score (GPU)
Mi 9 Lite +18%
880
Galaxy A51
745
Compute Score (GPU) 880 745
Single-core score 431 372
Multi-core score 1320 1204
Sources: Geekbench [3], [4]
AnTuTu Benchmark 11
Mi 9 Lite +18%
417439
Galaxy A51
352699
CPU 159583 135389
GPU 38436 30103
Memory 80418 90583
UX 139002 96624
Total score 417439 352699
Samples Less than 3 [10 tests]
3DMark Wild Life Extreme
Stability 99% -
Graphics test 1 FPS -
Graphics score 228 -
Sources: 3DMark [5], [6]
PCMark 3.0
Web score 6383 -
Video editing 5633 -
Photo editing 13187 -
Data manipulation 5855 -
Writing score 7602 -
Submit your benchmark results

Recent User Tests

The latest benchmark tests that have been submitted by users
Xiaomi Mi 9 Lite
DateBenchmarkResult
πŸ“˜ 2026-02-17 (Evgenie3311)AnTuTu 11417439
πŸ“˜ 2024-04-22 (gbirkin)Geekbench 6 GPU880
πŸ“˜ 2024-04-22 (gbirkin)Geekbench 6 CPU431 / 1320
Add View all (3)
Samsung Galaxy A51
DateBenchmarkResult
πŸ“˜ 2026-08-30 (Aginves)AnTuTu 11357049
πŸ“˜ 2026-08-28 (ROBIZ)AnTuTu 11331364
πŸ“˜ 2026-07-15 (Somya Lohiya)AnTuTu 11298360
πŸ“˜ 2026-06-20 (14burgos)AnTuTu 11393276
πŸ“˜ 2026-06-15 (Robiz)AnTuTu 11302904
Add View all (17)

Memory

RAM
RAM size 6 GB 4 GB
Memory type LPDDR4X LPDDR4X
Memory clock 1866 MHz 1866 MHz
Channels 2 2
Storage
Storage size 64 GB 64 GB
Storage type UFS 2.1 UFS 2.0
Memory card MicroSD MicroSD
Memory card max size Up to 256 GB Up to 512 GB

Software

Operating system Android 9.0 (Can be upgraded to Android 11) Android 10 (Can be upgraded to Android 13)
ROM MIUI 12.5 One UI 5.1
OS size 13 GB 23 GB
OS updates - 2 years
Security updates - 4 years

Battery

Capacity 4030 mAh 4000 mAh
Max charge power 18 W 15 W
Battery type Li-Po Li-Po
Replaceable No No
Wireless charging No No
Reverse charging No No
Fast charging Yes, Quick Charge 3.0 (50% in 35 min) Yes (40% in 35 min)
Full charging time 1:55 hr 1:50 hr
Battery life tests
Web browsing 07:34 hr 07:15 hr
Watching video 11:52 hr 11:25 hr
Gaming 04:35 hr 04:49 hr
Standby 138 hr 81 hr
General battery life
Mi 9 Lite +29%
23:06 hr
Galaxy A51
17:53 hr
Add your battery life

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 Up to 30FPS Up to 30FPS
1080p video recording Up to 60FPS Up to 30FPS
Slow motion 960 FPS (720p) 960 FPS (720p)
Angle of widest lens 118Β° 120Β°
Lenses 1) Standard: 48 MP
2) Ultrawide: 8 MP
3) Depth: 2 MP
1) Standard: 48 MP
2) Ultrawide: 12 MP
3) Macro: 5 MP
4) Depth: 5 MP
Camera features - Bokeh mode
- Pro mode		 - Bokeh mode
- Pro mode
Standard lens
Image resolution 48 MP 48 MP
Aperture f/1.8 f/2.0
Focal length - 26 mm
Sensor Sony IMX586 Sony IMX582
Sensor size 1/2" (β‰ˆ 0.5 inch) 1/2" (β‰ˆ 0.5 inch)
Pixel size 0.8 micron 0.8 micron
Autofocus Phase autofocus Phase autofocus
Stabilization Digital Digital
Ultra-wide lens
Image resolution 8 MP 12 MP
Aperture f/2.2 f/2.2
Focal length - 13 mm
Sensor size 1/4.0" (β‰ˆ 0.25 inch) -
Pixel size 1.12 micron 1.12 micron
Stabilization No Digital
Macro lens
Image resolution - 5 MP
Aperture - f/2.4
Focal length - 40 mm
Pixel size - 1.12 micron
Stabilization - Digital

Selfie camera

Megapixels 32 megapixels 32 megapixels
Image resolution 6528 x 4896 6560 x 4928
Aperture f/2.0 f/2.2
Focal length 26 mm 26 mm
Sensor Samsung S5KGD1 Samsung S5KGD1
Sensor size 1/2.8" (β‰ˆ 0.36 inch) 1/2.8" (β‰ˆ 0.36 inch)
Pixel size 0.8 micron 0.8 micron
Autofocus No No
Stabilization Digital Digital
Video resolution 1080p (Full HD) at 30 FPS 2160p (4K) at 30 FPS
Depth sensor (TOF 3D) No No

Connectivity

Wi-Fi standard Wi-Fi 5 (802.11 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
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
- 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 Yes 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
Mi 9 Lite +7%
87.4 dB
Galaxy A51
81.7 dB

Other

Category Mid-range Mid-range
Announced September 2019 December 2019
Release date September 2019 December 2019
Launch price (MSRP) $320 $399
Successor - Xiaomi 13 Lite - Samsung Galaxy A57 5G
SAR (head) 1.42 W/kg 0.596 W/kg
SAR (body) 1.4 W/kg 1.45 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

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

Cast your vote

So, which phone would you choose?
159 (77.2%)
47 (22.8%)
Total votes: 206

Related comparisons

1. Samsung Galaxy A51 vs Samsung Galaxy A36 5G
2. Samsung Galaxy A51 vs Samsung Galaxy A15 5G
3. Samsung Galaxy A51 vs Samsung Galaxy A26 5G
4. Samsung Galaxy A51 vs Samsung Galaxy A56 5G
Compare other phones (860+)

User opinions

You can share your opinion or ask a question in the comments below
🌐 Register your profile and become part of NanoReview community!
EnglishРусский