Home > Smartphone comparison > Mi 9 SE vs Xiaomi 12X – which one to choose?

Xiaomi Mi 9 SE vs Xiaomi 12X

41 out of 100
Xiaomi Mi 9 SE
VS
57 out of 100
Xiaomi 12X
Xiaomi Mi 9 SE
Xiaomi 12X

Here we compared two smartphones: the 5.97-inch Xiaomi Mi 9 SE (with Qualcomm Snapdragon 712) that was released on February 20, 2019, against the Xiaomi 12X, which is powered by Qualcomm Snapdragon 870 and came out 2 years and 11 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 SE
  • The rear camera has a 2x optical zoom
  • Weighs 21 grams less
Reasons to consider the Xiaomi 12X
  • 2.3x better performance in AnTuTu Benchmark (994K versus 434K)
  • Higher display refresh rate – 120 Hz
  • Comes with 1430 mAh larger battery capacity: 4500 vs 3070 mAh
  • Shows 39% longer battery life (22:44 vs 16:19 hours)
  • Delivers 45% higher peak brightness (927 against 638 nits)
  • Supports higher wattage charging (67W versus 18W)
  • Newer Bluetooth version (v5.1)
  • Optical image stabilization
  • Has a 0.31 inch larger screen size
  • More recent OS version: Android 13 versus 11
  • Uses a faster type of memory: LPDDR5
  • Compatible with Wi-Fi 6 wireless networks
  • Stereo speakers

Review

Evaluation of Xiaomi Mi 9 SE and Xiaomi 12X 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)

Should I update?
No 91% Yes
Yes, this is a clear and meaningful upgrade.
Updating from Xiaomi Mi 9 SE to Xiaomi 12X is a clear step forward, and the improvements should be easy to notice.
Main improvements: battery life, performance, and display.

Tests and specifications

Comparison table of technical specifications and tests
Phone:
Mi 9 SE
vs
Xiaomi 12X

Display

Type AMOLED AMOLED
Size 5.97 inches 6.28 inches
Resolution 1080 x 2340 pixels 1080 x 2400 pixels
Aspect ratio 19.5:9 20:9
PPI 432 ppi 419 ppi
Refresh rate 60 Hz 120 Hz
Adaptive refresh rate No Yes
Max rated brightness 585 nits 500 nits
Max rated brightness in HDR - 1100 nits
HDR support Yes, HDR10 Yes, HDR10+
Touch sampling rate - 480 Hz
Screen protection Corning Gorilla Glass 5 Gorilla Glass Victus
Screen-to-body ratio 84.1% 89.3%
Display features - Always-On Display - DCI-P3
- Always-On Display
- DC Dimming
Display tests
RGB color space 99.9% 98.6%
PWM 255 Hz 523 Hz
Response time 4.2 ms 1 ms
Contrast ∞ Infinity ∞ Infinity
Screen space comparison
Xiaomi 12X
6.28β€³ (20:9 ratio) = 14.8 in2
Mi 9 SE
5.97β€³ (19.5:9 ratio) = 13.6 in2
~8% more screen space
Peak brightness test (auto)
Mi 9 SE
638 nits
Xiaomi 12X +45%
927 nits
Sources: NotebookCheck [3], [4]

Design and build

Height 147.5 mm (5.81 inches) 152.7 mm (6.01 inches)
Width 70.5 mm (2.78 inches) 69.9 mm (2.75 inches)
Thickness 7.4 mm (0.29 inches) 8.16 mm (0.32 inches)
Weight 155 g (5.47 oz) 176 g (6.21 oz)
Waterproof No No
Rear material Glass Glass
Frame material Metal Metal
Colors Gray, Blue, Purple Black, Blue, Pink
Fingerprint scanner Yes, in-display Yes, in-display
Screen-to-body ratio
Mi 9 SE
84.1%
Xiaomi 12X +6%
89.3%

Performance

Chipset specifications of Xiaomi Mi 9 SE and Xiaomi 12X
SoC
Chipset Qualcomm Snapdragon 712 Qualcomm Snapdragon 870
Max clock 2200 MHz 3200 MHz
CPU cores 8 (2 + 6) 8 (1 + 3 + 4)
Architecture - 6 cores at 1.7 GHz: Kryo 360 Silver (Cortex-A55)
- 2 cores at 2.3 GHz: Kryo 360 Gold (Cortex-A75)		 - 4 cores at 1.8 GHz: Kryo 585 Silver (Cortex-A55)
- 3 cores at 2.42 GHz: Kryo 585 Gold (Cortex-A77)
- 1 core at 3.2 GHz: Kryo 585 Prime (Cortex-A77)
L3 cache 1 MB 4 MB
Manufacturing Samsung TSMC
Lithography process 10 nanometers 7 nanometers
Neural processor (NPU) Hexagon 685 DSP Hexagon 698
GPU
Graphics Adreno 616 Adreno 650
GPU shading units 256 768
GPU clock 610 MHz 670 MHz
FLOPS ~312.3 GFLOPS ~1029.1 GFLOPS

Benchmarks

Benchmark comparison of Xiaomi Mi 9 SE and Xiaomi 12X
Geekbench 6 (Single-Core)
Mi 9 SE
545
Xiaomi 12X +138%
1297
Geekbench 6 (Multi-Core)
Mi 9 SE
1594
Xiaomi 12X +115%
3428
Single-core score 545 1297
Multi-core score 1594 3428
Sources: Geekbench [3]
AnTuTu Benchmark 11
Mi 9 SE
434470
Xiaomi 12X +129%
994972
CPU 163890 389144
GPU 44262 137246
Memory 87907 189635
UX 138411 278947
Total score 434470 994972
Samples [2 tests] [15 tests]
3DMark Wild Life Extreme
Mi 9 SE
n/a
Xiaomi 12X
1216
Stability - 91%
Graphics test - 7 FPS
Graphics score - 1216
Sources: 3DMark [5], [6]
Submit your benchmark results

Recent User Tests

The latest benchmark tests that have been submitted by users
Xiaomi Mi 9 SE
DateBenchmarkResult
πŸ“˜ 2026-08-31 (hoover)AnTuTu 11441305
πŸ“˜ 2026-07-03 (artemy)AnTuTu 11434470
πŸ“˜ 2026-03-18 (Vladimir)AnTuTu 11434173
Add View all (3)
Xiaomi 12X
DateBenchmarkResult
πŸ“˜ 2026-08-29 (Forsic)AnTuTu 111020372
πŸ“˜ 2026-04-17 -> cnprtAnTuTu 111070681
πŸ“˜ 2026-04-17 (cnprt)AnTuTu 111052508
πŸ“˜ 2026-04-07 (cnprt)AnTuTu 11902096
πŸ“˜ 2026-03-25 (Pasergg)AnTuTu 11973586
Add View all (16)

Memory

RAM
RAM size 6 GB 8 GB
Memory type LPDDR4X LPDDR5
Memory clock 1866 MHz -
Channels 2 2
Storage
Storage size 64 GB 128 GB
Storage type UFS 2.1 UFS 3.1
Memory card No No

Software

Operating system Android 9.0 (Can be upgraded to Android 11.0) Android 11 (Can be upgraded to Android 13)
ROM MIUI 12 HyperOS 1.0
OS size 19 GB 29.3 GB

Battery

Capacity 3070 mAh 4500 mAh
Max charge power 18 W 67 W
Battery type Li-Po Li-Po
Replaceable No No
Wireless charging No No
Reverse charging No No
Fast charging Yes, Quick Charge 4 (50% in 30 min) Yes (78% in 30 min)
Full charging time 1:27 hr 0:48 hr
Battery life tests
Web browsing 05:40 hr 09:35 hr
Watching video 10:32 hr 14:39 hr
Gaming 03:52 hr 05:35 hr
Standby 83 hr 101 hr
General battery life
Mi 9 SE
16:19 hr
Xiaomi 12X +39%
22:44 hr
Add your battery life

Main camera

Matrix 48 megapixels 50 megapixels
Image resolution 8000 x 6000 8700 x 5800
Zoom Optical, 2x Digital
Flash Dual LED Dual LED
Stabilization Digital Optical
8K video recording No Up to 24FPS
4K video recording Up to 30FPS Up to 60FPS
1080p video recording Up to 60FPS Up to 60FPS
Slow motion 960 FPS (720p) 960 FPS (720p)
Angle of widest lens 123Β° 123Β°
Lenses 1) Standard: 48 MP
2) Telephoto: 8 MP
3) Ultrawide: 13 MP
1) Standard: 50 MP
2) Ultrawide: 13 MP
3) Macro: 5 MP
Camera features - Bokeh mode
- Pro mode		 - Bokeh mode
- Pro mode
Standard lens
Image resolution 48 MP 50 MP
Aperture f/1.8 f/1.9
Focal length 27 mm 26 mm
Sensor Sony IMX586 Sony IMX766
Sensor size 1/2" (β‰ˆ 0.5 inch) 1/1.56" (β‰ˆ 0.64 inch)
Pixel size 0.8 micron 1 micron
Autofocus Phase autofocus Phase autofocus (Dual Pixel)
Stabilization Digital Optical
Telephoto lens
Image resolution 8 MP -
Aperture f/2.4 -
Focal length 52 mm -
Sensor Omnivision OV8856 -
Sensor size 1/4" (β‰ˆ 0.25 inch) -
Pixel size 1.12 micron -
Stabilization Digital -
Ultra-wide lens
Image resolution 13 MP 13 MP
Aperture f/2.4 f/2.4
Focal length - 12 mm
Sensor Samsung S5K3L6 OmniVision OV13B10
Sensor size 1/3.1" (β‰ˆ 0.32 inch) 1/3.06" (β‰ˆ 0.33 inch)
Pixel size 1.12 micron 1.12 micron
Stabilization Digital Digital
Macro lens
Image resolution - 5 MP
Aperture - f/2.4
Focal length - 50 mm
Sensor - Samsung S5K5E9
Pixel size - 1.12 micron
Stabilization - Optical

Selfie camera

Megapixels 20 megapixels 32 megapixels
Image resolution 5120 x 3840 6528 x 4896
Aperture f/2.0 f/2.4
Focal length 18 mm 26 mm
Sensor Sony IMX576 OmniVision OV32B40
Sensor size 1/2.78" (β‰ˆ 0.36 inch) 1/3" (β‰ˆ 0.33 inch)
Pixel size 0.9 micron 0.7 micron
Autofocus Phase autofocus No
Stabilization Digital Digital
Video resolution 1080p (Full HD) at 30 FPS 1080p (Full HD) at 60 FPS
Depth sensor (TOF 3D) No No

Connectivity

Wi-Fi standard Wi-Fi 5 (802.11 a/b/g/n/ac) Wi-Fi 6 (802.11 a/b/g/n/ac/ax)
Wi-Fi features - Dual Band
- Wi-Fi Direct
- Wi-Fi Hotspot
- Wi-Fi Display		 - Dual Band
- Wi-Fi MiMO
- Wi-Fi Direct
- Wi-Fi Hotspot
- Wi-Fi Display
Bluetooth version 5 5.1
Bluetooth features LE, A2DP LE
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, NAVIC
NFC* Yes Depends on the region
Infrared port Yes Yes
Network
Number of SIM* 2 2
Type of SIM card Nano Nano
Multi SIM mode Standby Standby
eSIM support* No -
Hybrid slot No No
LTE Cat* 15 -
5G support No Yes

Sound

Speakers Mono Stereo
Headphone audio jack No No
FM radio No No
Dolby Atmos No Yes
Speakers test
Max loudness
Mi 9 SE
81.5 dB
Xiaomi 12X +11%
90.1 dB

Other

Category Mid-range Flagship
Announced February 2019 December 2021
Release date March 2019 December 2021
Launch price (MSRP) $400 $650
Successor - Xiaomi 15T -
SAR (head) 1.39 W/kg -
SAR (body) 1.39 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
Bundled charger - Yes, 67 W
*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 12X is definitely a better buy.

Cast your vote

So, which phone would you choose?
25 (47.2%)
28 (52.8%)
Total votes: 53

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