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

Asus Zenfone 12 Ultra vs Xiaomi 15

85 out 100
Asus Zenfone 12 Ultra
VS
93 out 100
Xiaomi 15
Asus Zenfone 12 Ultra
Xiaomi 15

Compared 2 smartphones : Asus Zenfone 12 Ultra Manufactured in February, 2025, with display 6.78 with chipsetQualcomm Snapdragon 8 Elite, vs Xiaomi 15, Manufactured in October, 2024 with chipsetQualcomm Snapdragon 8 Elite. 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 Asus Zenfone 12 Ultra
  • Larger display: 6.78in
  • Higher refresh rate: 144Hz
  • Higher battery capacity: 5500mAh vs 5400mAh
Reasons to choose Xiaomi 15
  • Higher pixel density: 460ppi
  • Lighter design: 191g vs 220g
  • Supports DisplayPort
  • Supports Dolby Atmos
  • Infrared port
  • Includes charger

Versions

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

Review

Key Specs Asus Zenfone 12 Ultra and Xiaomi 15
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:
Zenfone 12 Ultra
vs
Xiaomi 15

Display

Display quality comparison
Type AMOLED AMOLED
Size 6.78 in 6.36 in
Resolution 1080x2400 pixels 1200x2670 pixels
Aspect ratio 20:9 20:9
Pixel density 388 ppi 460 ppi
Refresh rate 144 Hz 120 Hz
Adaptive refresh rate Yes Yes (1-120 Hz)
Max brightness 2500 nits 1500 nits
HDR support Yes HDR10+ Yes Dolby Vision
Touch Sampling Rate n/a 300 Hz
Screen-to-body ratio 88 % 90.1 %
Features - DCI-P3
- Always-On Display
- DC dimming		 - DCI-P3
- Always-On Display
- DC dimming
Display test
Peak brightness (auto)
Asus Zenfone 12 Ultra
1953 nits
Xiaomi 15
1508 nits
sRGB gamutn/a99.5 %
PWM (Flicker)n/a120 Hz
Response timen/a1 ms
Contrastn/a∞ Infinite
Sources: NotebookCheck [Xiaomi 15]

Design & Build

Design and ergonomics comparison
Height 163.8 mm (6.45 in) 152.3 mm (6 in)
Width 77 mm (3.03 in) 71.2 mm (2.8 in)
Thickness 8.9 mm (0.35 in) 8.08 mm (0.32 in)
Weight 220 g (7.76 oz) 191 g (6.74 oz)
Water resistance IP68 IP68
Cooling system Vapor chamber Vapor chamber
Back panel Glass Glass
Frame Metal Metal
Colors - White
- Black
- Green
- Yellow		 - White
- Black
- Silver
- Green
- Purple
Fingerprint sensor Yes In-Display Yes In-Display
Screen-to-body ratio
Asus Zenfone 12 Ultra
88 %
Xiaomi 15
90.1 %

Performance

Testing Asus Zenfone 12 Ultra and Xiaomi 15 In benchmarks
Processor
Chipset Qualcomm Snapdragon 8 Elite Qualcomm Snapdragon 8 Elite
Max Frequency 4320 MHz 4320 MHz
CPU Cores 8 (2 + 6) 8 (2 + 6)
Architecture - 6/3.53 (Oryon (Phoenix M))
- 2/4.32 (Oryon (Phoenix L))		 - 6/3.53 (Oryon (Phoenix M))
- 2/4.32 (Oryon (Phoenix L))
Process TSMC TSMC
Transistor Size 3 nm 3 nm
Neural Processor Hexagon Hexagon
Graphics Adreno 830 Adreno 830
GPU Cores 1536 1536
GPU Frequency 1100 MHz 1100 MHz
FLOPS 3379.2 GFLOPS 3379.2 GFLOPS
GeekBench v6
Geekbench 6 (Single-Core)
Asus Zenfone 12 Ultra
3164
Xiaomi 15
2934
Geekbench 6 (Multi-Core)
Asus Zenfone 12 Ultra
9880
Xiaomi 15
8762
Geekbench 6 (Single-Core)31642934
Geekbench 6 (Multi-Core)98808762
Geekbench Compute (GPU)2632524507
Sources: Geekbench v6 [Asus Zenfone 12 Ultra], [Xiaomi 15]
AnTuTu 10
AnTuTu 10
Asus Zenfone 12 Ultra
2853794
Xiaomi 15
2620144
CPU610195584725
GPU12277731142381
Memory546153519406
UX469673373632
NanoReview Score28537942620144
3DMark Wild Life
3DMark Wild Life
Asus Zenfone 12 Ultra
n/a
Xiaomi 15
20823
Sources: 3DMark [Xiaomi 15]
PCMark 3.0
PCMark 3.0
Asus Zenfone 12 Ultra
n/a
Xiaomi 15
18292
Writing scoren/a22508
Web scoren/a18826
Video editingn/a8060
Data manipulationn/a14605
NanoReview Scoren/a18292

Memory

RAM
RAM Size - 12 GB
- 16 GB		 - 12 GB
- 16 GB
Memory Type LPDDR5X LPDDR5X
Memory Frequency 5333 MHz n/a
Channels 2 2
Storage
Storage Capacity- 256 GB
- 512 GB		- 256 GB
- 512 GB
- 1024 GB
Storage TypeUFS 4.0UFS 4.0
Memory CardNoNo

Software

OS Android 15 Android 15
OS Size n/a 21 GB
UI Skin n/a HyperOS 2.0

Battery

Volume 5500 mAh 5400 mAh
Max Charging Power 65 W 90 W
Battery Type Li-Po Silicon Carbon (Si/C)
Removable No No
Wireless Charging Yes (15 W) Yes (50 W)
Reverse Charging Yes Yes (Wireless)
Fast Charging Yes (77% in 30 min) Yes (83% in 30 min)
Full Charge Time 0:45 h 0:45 h
Battery Life Test
Battery Life
Asus Zenfone 12 Ultra
21:58
Xiaomi 15
31:54
Web Browsing09:46 h13:20 h
Video Playback12:28 h19:22 h
Games07:02 h07:10 h
Standby Mode98 h150 h

Main camera

Matrix 50 MP 50 MP
Photo resolution 8192x6144 pixels 8192x6144 pixels
Zoom Optical, 3x Optical, 2.6x
Flash LED Dual LED
Stabilization Optical Optical
8K Recording Yes (Up to 30 fps) Yes (Up to 30 fps)
4K Recording Yes (Up to 60 fps) Yes (Up to 120 fps)
1080p Recording Yes (Up to 60 fps) Yes (Up to 60 fps)
Slow Motion 480 fps (720p) 1920 fps (720p)
Wide-angle lens 120 ° 115 °
Lenses count Standard: 50 MP
Telephoto: 32 MP
Ultra-wide: 13 MP		 Standard: 50 MP
Telephoto: 50 MP
Ultra-wide: 50 MP
Features - Bokeh effect
- Pro mode
- RAW support		 - Bokeh effect
- Pro mode
- RAW support
Main lens
Matrix50 MP50 MP
Aperturef/1.9f/1.6
Focal length24 mm23 mm
SensorSony LYT-700OmniVision OVX9000 Light Fusion 900
Sensor size1/1.561/1.31
Pixel size1 μm1.2 μm
AutofocusPhase autofocusLaser autofocus
StabilizationOpticalOptical
Telephoto
Matrix32 MP50 MP
Aperturef/2.4f/2.0
Focal length65 mm60 mm
Sensorn/aSamsung S5KJN5
Sensor size1/3.21/2.76
Pixel size0.7 μm0.64 μm
StabilizationOpticalOptical
Ultra-wide lens
Matrix13 MP50 MP
Aperturef/2.2f/2.2
Focal length13 mm14 mm
Sensorn/aSamsung S5KJN1
Sensor size1/3.01/2.76
Pixel size1.12 μm0.64 μm
StabilizationDigitalDigital
Main camera DxOMark results
Photo quality
Asus Zenfone 12 Ultra
n/a
Xiaomi 15
150
Video quality
Asus Zenfone 12 Ultra
n/a
Xiaomi 15
133
Overall camera score
Asus Zenfone 12 Ultra
n/a
Xiaomi 15
147
Bokehn/a75
Previewn/a87
Zoomn/a152
Sources: DxOMark [Xiaomi 15]

Front camera

Matrix 32 MP 32 MP
Photo resolution 3264x2448 pixels 6528x4896 pixels
Aperture f/2.5 f/2.0
Focal length 22 mm 22 mm
Sensor CMOS Omnivision OV32B
Sensor size 1/3.2 1/3.14
Pixel size 0.7 μm 0.7 μm
Autofocus No No
Stabilization Digital Digital
Video resolution 1080p (Full HD) at 30 fps 2160p (4K) 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 7 (802.11 a/b/g/n/ac/ax/be)
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 5.4 5.4
Bluetooth features LE LE
USB type USB Type-C USB Type-C
USB version 3.2 3.2
USB features - Charging
- USB Storage Mode
- OTG		 - Charging
- USB Storage Mode
- OTG
DisplayPort n/a Yes
GPS - GPS
- GLONASS
- Beidou
- Galileo
- QZSS
- NAVIC		 - GPS
- GLONASS
- Beidou
- Galileo
- QZSS
- NAVIC
NFC* Yes Yes
Infrared Port No Yes
Connectivity
SIM Count*22
SIM TypeNanoNano
SIM ModeDual SIM StandbyDual SIM Standby
eSIM Support *YesYes
Hybrid SlotNoNo
2G BandsGSM 850 / 900 / 1800 / 1900MHzGSM B2/B3/B5/B8
3G BandsWCDMA 800 / 850 / 900 / 1700 / 1900 / 2100MHzWCDMA B1/B2/B4/B5/B6/B8/B19
LTE Bands*LTE (B1/B2/B3/B4/B5/B7/B8/B12/B17/B18/B19/B20/B25/B26/B28/B32/B34/B38/B39/B40/B41/B42/B43/B48/B66)LTE (B1/B2/B3/B4/B5/B7/B8/B12/B17/B18/B19/B20/B26/B28/B34/B38/B39/B40/B41/B42/B48/B66)
LTE category20n/a
5G SupportYesYes

Sound

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

Other

Class Flagship Flagship
Announced February, 2025 yr October, 2024 yr
Release Date February, 2025 yr October, 2024 yr
Launch Price ($) 999 757
Sensors - Hall Sensor
- Proximity Sensor
- Gyroscope
- Accelerometer
- Ambient Light Sensor
- Compass
- Fingerprint sensor		 - Proximity Sensor
- Gyroscope
- Accelerometer
- Ambient Light Sensor
- Compass
- Fingerprint sensor
Charger Included No Yes 90 W
* Attention! Config, frequencies, NFC, and other specs may vary by region.

Results

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