Home Phone comparison Xiaomi 15 Ultra and Xiaomi 12 - Which is better?

Xiaomi 15 Ultra vs Xiaomi 12

95 out 100
Xiaomi 15 Ultra
VS
65 out 100
Xiaomi 12
Xiaomi 15 Ultra
Xiaomi 12

Compared 2 smartphones : Xiaomi 15 Ultra Manufactured in February, 2025, with display 6.73 with chipsetQualcomm Snapdragon 8 Elite, vs Xiaomi 12, Manufactured in December, 2021 with chipsetQualcomm Snapdragon 8 Gen 1. Below are specs, tests, pros and cons for each device

  1. Differences
  2. Review
  3. Specs
  4. Benchmarks
  5. Battery Life
  6. Cameras
  7. Comments (0)

Key Differences

Device key advantages
Reasons to choose Xiaomi 15 Ultra
  • Larger display: 6.73in
  • Higher pixel density: 522ppi
  • Higher battery capacity: 5410mAh vs 4500mAh
  • Newer Bluetooth version: 6.0 vs 5.2
  • Supports newer USB: 3.2 vs 2
  • Supports DisplayPort
  • Built-in eSIM
Reasons to choose Xiaomi 12
  • Lighter design: 180g vs 226g

Versions

Available versions and configurations
Memory Options - 12/256 GB
- 16/512 GB
- 16/1024 GB		 - 8/128 GB
- 8/256 GB
- 12/256 GB

Review

Key Specs Xiaomi 15 Ultra and Xiaomi 12
Display
Color accuracy, sharpness & brightness
Camera
Main & front camera tests
Performance
App & system performance
Games
3D gaming performance
Battery
Battery life, charging speed & type
Connectivity
Connectivity features
NanoReview Score
Overall score by NanoReview
Adjust each parameter’s importance to find the best match for you.
Customize your score
Function
Importance (Weight)
Display:
Camera:
Performance:
Gaming:
Battery:
Connectivity:
Higher weight means greater impact on NanoReview score.

Tests & specs

Specs & test comparison
Smartphones:
Xiaomi 15 Ultra
vs
Xiaomi 12

Display

Display quality comparison
Type AMOLED AMOLED
Size 6.73 in 6.28 in
Resolution 1440x3200 pixels 1080x2400 pixels
Aspect ratio 20:9 20:9
Pixel density 522 ppi 419 ppi
Refresh rate 120 Hz 120 Hz
Adaptive refresh rate Yes (1-120 Hz) Yes (60-120 Hz)
Max brightness n/a 500 nits
HDR support Yes Dolby Vision Yes HDR10+
Touch Sampling Rate 300 Hz 480 Hz
Screen-to-body ratio 90 % 89.3 %
Features - DCI-P3
- Always-On Display
- DC dimming		 - DCI-P3
- Always-On Display
- DC dimming
Display test
Peak brightness (auto)
Xiaomi 15 Ultra
1599 nits
Xiaomi 12
887 nits
sRGB gamut99.7 %n/a
PWM (Flicker)120 Hzn/a
Response time1 msn/a
Contrast∞ Infiniten/a
Sources: NotebookCheck [Xiaomi 15 Ultra]

Design & Build

Design and ergonomics comparison
Height 161.3 mm (6.35 in) 152.7 mm (6.01 in)
Width 75.3 mm (2.96 in) 69.9 mm (2.75 in)
Thickness 9.35 mm (0.37 in) 8.16 mm (0.32 in)
Weight 226 g (7.97 oz) 180 g (6.35 oz)
Water resistance IP68 No
Cooling system Vapor chamber n/a
Back panel Glass Glass
Frame Metal Metal
Colors - White
- Black
- Silver
- Green		 - Black
- Blue
- Pink
Fingerprint sensor Yes In-Display Yes In-Display
Screen-to-body ratio
Xiaomi 15 Ultra
90 %
Xiaomi 12
89.3 %

Performance

Testing Xiaomi 15 Ultra and Xiaomi 12 In benchmarks
Processor
Chipset Qualcomm Snapdragon 8 Elite Qualcomm Snapdragon 8 Gen 1
Max Frequency 4320 MHz 3000 MHz
CPU Cores 8 (2 + 6) 8 (1 + 3 + 4)
Architecture - 6/3.53 (Oryon (Phoenix M))
- 2/4.32 (Oryon (Phoenix L))		 - 4/1.8 (Cortex-A510)
- 3/2.5 (Cortex-A710)
- 1/3 (Cortex-X2)
Process TSMC Samsung
Transistor Size 3 nm 4 nm
Neural Processor Hexagon Hexagon
Graphics Adreno 830 Adreno 730
GPU Cores 1536 1024
GPU Frequency 1100 MHz 818 MHz
FLOPS 3379.2 GFLOPS 1675.3 GFLOPS
GeekBench v6
Geekbench 6 (Single-Core)
Xiaomi 15 Ultra
3008
Xiaomi 12
1702
Geekbench 6 (Multi-Core)
Xiaomi 15 Ultra
9065
Xiaomi 12
3977
Geekbench 6 (Single-Core)30081702
Geekbench 6 (Multi-Core)90653977
Sources: Geekbench v6 [Xiaomi 15 Ultra], [Xiaomi 12]
AnTuTu 10
AnTuTu 10
Xiaomi 15 Ultra
2544373
Xiaomi 12
1187033
CPU558586308025
GPU1040161439066
Memory520300237645
UX425326212297
NanoReview Score25443731187033
3DMark Wild Life
3DMark Wild Life
Xiaomi 15 Ultra
n/a
Xiaomi 12
8751
Stabilityn/a60 %
Graphics Testn/a52 fps
Graphics Scoren/a8751
Sources: 3DMark [Xiaomi 12]
PCMark 3.0
PCMark 3.0
Xiaomi 15 Ultra
n/a
Xiaomi 12
12987
Writing scoren/a14840
Web scoren/a11534
Video editingn/a7452
Data manipulationn/a9643
NanoReview Scoren/a12987

Memory

RAM
RAM Size 12 GB - 8 GB
- 12 GB
Memory Type LPDDR5X LPDDR5
Memory Frequency 5333 MHz 3200 MHz
Channels 2 4
Storage
Storage Capacity256 GB- 128 GB
- 256 GB
Storage TypeUFS 4.1UFS 3.1
Memory CardNoNo

Software

OS Android 15 Android 12 (Upgradeable to Android 14)
OS Size 23.9 GB n/a
UI Skin HyperOS 2.0 HyperOS 1.0

Battery

Volume 5410 mAh 4500 mAh
Max Charging Power 90 W 67 W
Battery Type Silicon Carbon (Si/C) Li-Po
Removable No No
Wireless Charging Yes (80 W) Yes (50 W)
Reverse Charging Yes (Wireless) Yes (Wireless)
Fast Charging Yes (72% in 30 min) Yes (87% in 30 min)
Full Charge Time 0:51 h 0:46 h
Battery Life Test
Battery Life
Xiaomi 15 Ultra
30:03
Xiaomi 12
15:58
Web Browsing12:19 h06:17 h
Video Playback18:43 h10:46 h
Games06:45 h04:42 h
Standby Mode141 h71 h

Main camera

Matrix 50 MP 50 MP
Photo resolution 8192x6144 pixels 8192x6144 pixels
Zoom Optical, 4.3x Digital
Flash Dual LED Dual LED
Stabilization Optical Optical
8K Recording Yes (Up to 30 fps) Up to 24FPS
4K Recording Yes (Up to 120 fps) Yes (Up to 60 fps)
1080p Recording Yes (Up to 60 fps) Yes (Up to 60 fps)
Slow Motion 1920 fps (1080p) 1920 fps (720p)
Wide-angle lens 115 ° 123 °
Lenses count Standard: 50 MP
Telephoto: 200 MP
Telephoto: 50 MP
Ultra-wide: 50 MP
Depth		 Standard: 50 MP
Ultra-wide: 13 MP
Macro: 5 MP
Features - Bokeh effect
- Pro mode
- RAW support		 - Bokeh effect
- Pro mode
- RAW support
Main lens
Matrix50 MP50 MP
Aperturef/1.63f/1.9
Focal length23 mm26 mm
SensorSony LYT-900Sony IMX766
Sensor size1/1.01/1.56
Pixel size1.6 μm1 μm
AutofocusLaser autofocusPhase autofocus (Dual Pixel)
StabilizationOpticalOptical
Telephoto
Matrix200 MPn/a
Aperturef/2.6n/a
Focal length100 mmn/a
SensorSamsung ISOCELL S5KHP9n/a
Sensor size1/1.4n/a
Pixel size0.56 μmn/a
StabilizationOpticaln/a
Ultra-wide lens
Matrix50 MP13 MP
Aperturef/2.2f/2.4
Focal length14 mm12 mm
SensorSamsung S5KJN5OmniVision OV13B10
Sensor size1/2.761/3.06
Pixel size0.64 μm1.12 μm
StabilizationDigitalDigital
Main camera DxOMark results
Photo quality
Xiaomi 15 Ultra
158
Xiaomi 12
118
Video quality
Xiaomi 15 Ultra
134
Xiaomi 12
121
Overall camera score
Xiaomi 15 Ultra
153
Xiaomi 12
113
Bokeh8055
Preview8969
Zoomn/a72
Sources: DxOMark [Xiaomi 15 Ultra], [Xiaomi 12]

Front camera

Matrix 32 MP 32 MP
Photo resolution 6528x4896 pixels 6528x4896 pixels
Aperture f/2.0 f/2.4
Focal length 22 mm 26 mm
Sensor Omnivision OV32B OmniVision OV32B40
Sensor size 1/3.14 n/a
Pixel size 0.7 μm 0.7 μm
Autofocus No No
Stabilization Digital Digital
Video resolution 2160p (4K) at 60 fps 1080p (Full HD) at 60 fps
TOF 3D sensor No No

Connectivity

Wi-Fi version Wi-Fi 7 (802.11 a/b/g/n/ac/ax/be) 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 6.0 5.2
Bluetooth features LE LE
USB type USB Type-C USB Type-C
USB version 3.2 2
USB features - Charging
- USB Storage Mode
- OTG		 - Charging
- USB Storage Mode
- OTG
DisplayPort Yes n/a
GPS - GPS
- GLONASS
- Beidou
- Galileo
- QZSS
- NAVIC		 - GPS
- GLONASS
- Beidou
- Galileo
- NAVIC
NFC* Yes Yes
Infrared Port Yes Yes
Connectivity
SIM Count*22
SIM TypeNanoNano
SIM ModeDual SIM StandbyDual SIM Standby
eSIM Support *YesNo
Hybrid SlotNoNo
2G BandsGSM 2/3/5/8GSM 850 900 1800 1900 MHz
3G BandsWCDMA 1/2/4/5/6/8/19WCDMA B1/2/4/5/6/8/19
LTE Bands*LTE (B1/B2/B3/B4/B5/B7/B8/B12/B17/B18/B19/B20/B26/B28/B34/B38/B39/B40/B41/B42/B48/B66)LTE (B1/B2/B3/B4/B5/B7/B8/B12/B13/B17/B18/B19/B20/B25/B26/B28/B32/B66)
LTE categoryn/a20
5G SupportYesYes

Sound

Speakers n/a Stereo
3.5 mm Jack No No
FM Radio No No
Dolby Atmos Yes Yes
Speaker Test
Max Volume
Xiaomi 15 Ultra
92.1 dB
Xiaomi 12
n/a

Other

Class Flagship Flagship
Announced February, 2025 yr December, 2021 yr
Release Date February, 2025 yr December, 2021 yr
Launch Price ($) n/a 580
MSRP ($) 1099 n/a
Sensors - Barometer
- Proximity Sensor
- Gyroscope
- Accelerometer
- Ambient Light Sensor
- Compass
- Fingerprint sensor		 - Gyroscope
- Accelerometer
- Ambient Light Sensor
- Compass
- Fingerprint sensor
Charger Included Yes 90 W Yes 67 W

Note

Xiaomi 15 Ultra:

The Chinese version of the Xiaomi 15 Ultra has a 6000 mAh battery, while the international model comes with 5410 mAh, leading to a noticeable difference in battery life.

* Attention! Config, frequencies, NFC, and other specs may vary by region.

Results

After analyzing the data, we consider Xiaomi 15 Ultra the clear winner in this comparison.

Survey

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Total Votes: 1

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