Xiaomi 12X vs 12S Ultra

Here we compared two flagship smartphones: the 6.28-inch Xiaomi 12X (with Qualcomm Snapdragon 870) that was released on December 28, 2021, against the Xiaomi 12S Ultra, which is powered by Qualcomm Snapdragon 8 Plus Gen 1 and came out 6 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 12X
  • Shows 13% longer battery life (35:28 vs 31:31 hours)
  • Weighs 49 grams less
  • Better grip in hands – the body is 5.02 mm narrower
Reasons to consider the Xiaomi 12S Ultra
  • Waterproof body (IP68 classification)
  • The rear camera has a 5x optical zoom
  • 59% better performance in AnTuTu Benchmark (1086K versus 682K)
  • 24% higher pixel density (521 vs 419 PPI)
  • Supports wireless charging up to 50W
  • Newer Bluetooth version (v5.2)
  • Has a 0.45 inch larger screen size
  • Comes with 360 mAh larger battery capacity: 4860 vs 4500 mAh
  • Delivers 15% higher peak brightness (1055 against 916 nits)
  • Slow-motion recording at 1920FPS
  • The front-facing camera can record video at 4K

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

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 AMOLED
Size 6.28 inches 6.73 inches
Resolution 1080 x 2400 pixels 1440 x 3200 pixels
Aspect ratio 20:9 20:9
PPI 419 ppi 521 ppi
Refresh rate 120 Hz 120 Hz
Max rated brightness 500 nits 1000 nits
Max rated brightness in HDR 1100 nits 1500 nits
HDR support Yes, HDR10+ Yes, HDR10+
Screen protection Gorilla Glass Victus Gorilla Glass Victus
Screen-to-body ratio 89.2% 89.3%
Display features - DCI-P3
- Always-On Display
- DC Dimming
- DCI-P3
- Always-On Display
- DC Dimming
Display tests
RGB color space 98.6% 99.7%
PWM 523 Hz 186 Hz
Response time 1 ms 2 ms
Contrast ∞ Infinity ∞ Infinity
Peak brightness test (auto)
916 nits
12S Ultra +15%
1055 nits
Sources: NotebookCheck [3], [4]

Design and build

Height 152.7 mm (6.01 inches) 163.17 mm (6.42 inches)
Width 69.9 mm (2.75 inches) 74.92 mm (2.95 inches)
Thickness 8.16 mm (0.32 inches) 9.06 mm (0.36 inches)
Weight 176 gramm (6.21 oz) 225 gramm (7.94 oz)
Waterproof No IP68
Rear material Glass -
Frame material Metal Metal
Colors Black, Blue, Pink Black, Green
Fingerprint scanner Yes, in-display Yes, in-display
Screen-to-body ratio
89.2%
89.3%

Performance

Tests of Xiaomi 12X and Xiaomi 12S Ultra in the benchmarks
SoC
Chipset Qualcomm Snapdragon 870 Qualcomm Snapdragon 8 Plus Gen 1
Max. clock 3200 MHz 3190 MHz
CPU cores 8 (1 + 3 + 4) 8 (1 + 3 + 4)
Architecture - 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)
- 4 cores at 2 GHz: Cortex-A510
- 3 cores at 2.75 GHz: Cortex-A710
- 1 core at 3.2 GHz: Cortex-X2
L3 cache 4 MB 6 MB
Lithography process 7 nanometers 4 nanometers
Graphics Adreno 650 Adreno 730
GPU clock 675 MHz 900 MHz
FLOPS ~1372 GFLOPS -
Memory
RAM size 8, 12 GB 8, 12 GB
Memory type LPDDR5 LPDDR5
Memory clock - 3200 MHz
Channels 2 4
Storage
Storage size 128, 256 GB 256, 512 GB
Storage type UFS 3.1 UFS 3.1
Memory card No No

Benchmarks

Geekbench 5 (Single-Core)
12S Ultra +40%
1313
Geekbench 5 (Multi-Core)
3167
12S Ultra +38%
4364
AnTuTu Benchmark 9
682264
12S Ultra +59%
1086121
CPU 185270 252060
GPU 242268 482481
Memory 108952 182844
UX 148511 173557
Total score 682264 1086121
3DMark Wild Life Performance
4243
12S Ultra +131%
9805
Stability 99% 68%
Graphics test 25 FPS 58 FPS
Graphics score 4243 9805
PCMark 3.0 score - 13376
AnTuTu Benchmark 9 Android Rating (156th and 15th place)
Sources: 3DMark [3], [4]

Software

Operating system Android 11 (Can be upgraded to Android 12) Android 12
ROM MIUI 13 MIUI 13
OS size 29.3 GB 32 GB

Battery

Specifications
Capacity 4500 mAh 4860 mAh
Charge power 67 W 67 W
Battery type Li-Po Li-Po
Replaceable No No
Wireless charging No Yes (50 W)
Reverse charging No Yes, (wireless)
Fast charging Yes (78% in 30 min) Yes (73% in 30 min)
Full charging time 0:48 hr 0:50 hr
Battery life tests
Web browsing 13:05 hr 11:47 hr
Watching video 16:44 hr 13:51 hr
Gaming 05:31 hr 05:38 hr
Standby 104 hr 94 hr
General battery life
Xiaomi 12X +13%
35:28 hr
31:31 hr

Camera

Specs and camera test of smartphones
Main camera
Matrix 50 megapixels 50 megapixels
Image resolution 8700 x 5800 -
Zoom Digital Optical, 5x
Flash Dual LED Dual LED
Stabilization Optical Optical
8K video recording Up to 24FPS Up to 24FPS
4K video recording Up to 60FPS Up to 60FPS
1080p video recording Up to 60FPS Up to 60FPS
Slow motion 960 FPS (720p) 1920 FPS (720p)
Angle of widest lens 123° 128°
Lenses 3 (50 MP + 13 MP + 5 MP) 4 (50 MP + 48 MP + 48 MP + 0.3 MP)
Wide (main) lens - 50 MP
- Aperture: f/1.9
- Focal length: 26 mm
- Pixel size: 1 micron
- Sensor: 1/1.56", Sony IMX766 (Exmor-RS CMOS)
- Phase autofocus (Dual Pixel)
- Optical stabilization
- 50 MP
- Aperture: f/1.9
- Focal length: 23 mm
- Pixel size: 1.6 micron
- Sensor: 1/1", Sony IMX989 (Exmor-RS CMOS)
- Laser autofocus
- Optical stabilization
Telephoto lens - - 48 MP
- Aperture: f/4.1
- Focal length: 120 mm
- Pixel size: 0.8 micron
- Sensor: 1/2.0", Sony IMX586 (Exmor-RS CMOS)
- Phase autofocus (Dual Pixel)
- Optical stabilization
Ultra-wide lens - 13 MP
- Aperture: f/2.4
- Pixel size: 1.12 micron
- Sensor: 1/3.06", OmniVision OV13B10 (CMOS)
- 48 MP
- Aperture: f/2.2
- Focal length: 13 mm
- Pixel size: 0.8 micron
- Sensor: 1/2.0", Sony IMX586 (Exmor-RS CMOS)
- Phase autofocus (Dual Pixel)
Macro lens - 5 MP
- Aperture: f/2.4
- Focal length: 50 mm
- Pixel size: 1.12 micron
- Phase autofocus
- Optical stabilization
-
Depth lens - - 0.3 MP
Camera features - Bokeh mode
- Pro mode
- Bokeh mode
- Pro mode
- RAW support
Samples - Photo samples of Xiaomi 12S Ultra from DxOMark
Selfie camera
Megapixels 32 megapixels 32 megapixels
Image resolution 6528 x 4896 6528 x 4896
Aperture f/2.4 f/2.5
Focal length 26 mm 26 mm
Pixel size 0.7 microns 0.7 microns
Sensor type CMOS CMOS
Sensor size 1/3" 1/3.2"
Video resolution 1080p (Full HD) at 60 FPS 2160p (4K) at 30 FPS

DxOMark camera tests

Photo quality
Video quality
Generic camera score

Connectivity

Wi-Fi standard Wi-Fi 6 (802.11 a/b/g/n/ac/ax) Wi-Fi 6E (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 MiMO
- Wi-Fi Direct
- Wi-Fi Hotspot
- Wi-Fi Display
Bluetooth version 5.1 5.2
Bluetooth features LE LE
USB type USB Type-C USB Type-C
USB version 2 2
USB features - Charging
- USB-Storage mode
- OTG
- Charging
- USB-Storage mode
- OTG
GPS GPS, GLONASS, Beidou, Galileo, NAVIC GPS, GLONASS, Beidou, Galileo, QZSS, NAVIC
NFC* Depends on the region Yes
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* - 20
5G support Yes Yes

Sound

Speakers Stereo Stereo
Headphone audio jack No No
FM radio No No
Dolby Atmos Yes Yes
Speakers test
Max. loudness
90.1 dB
83.2 dB

Other

Category Flagship Flagship
Announced December 2021 July 2022
Release date December 2021 July 2022
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 12S Ultra is definitely a better buy.

Cast your vote

So, which phone would you choose?
9 (60%)
6 (40%)
Total votes: 15

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