Home Phone comparison Xiaomi 15 Ultra and Xiaomi Poco X4 GT - Which is better?

Xiaomi 15 Ultra vs Xiaomi Poco X4 GT

95 out 100
Xiaomi 15 Ultra
VS
60 out 100
Xiaomi Poco X4 GT
Xiaomi 15 Ultra
Xiaomi Poco X4 GT

Compared 2 smartphones : Xiaomi 15 Ultra Manufactured in February, 2025, with display 6.73 with chipsetQualcomm Snapdragon 8 Elite, vs Xiaomi Poco X4 GT, Manufactured in June, 2022 with chipsetMediaTek Dimensity 8100. 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 5080mAh
  • Newer Bluetooth version: 6.0 vs 5.3
  • Supports newer USB: 3.2 vs 2
  • Supports DisplayPort
  • Built-in eSIM
Reasons to choose Xiaomi Poco X4 GT
  • Higher refresh rate: 144Hz
  • Lighter design: 200g vs 226g

Versions

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

Review

Key Specs Xiaomi 15 Ultra and Xiaomi Poco X4 GT
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 Poco X4 GT

Display

Display quality comparison
Type AMOLED IPS LCD
Size 6.73 in 6.6 in
Resolution 1440x3200 pixels 1080x2460 pixels
Aspect ratio 20:9 20:9
Pixel density 522 ppi 407 ppi
Refresh rate 120 Hz 144 Hz
Adaptive refresh rate Yes (1-120 Hz) Yes (60-144 Hz)
Max brightness n/a 500 nits
HDR support Yes Dolby Vision Yes Dolby Vision
Touch Sampling Rate 300 Hz 270 Hz
Screen-to-body ratio 90 % 86.5 %
Features - DCI-P3
- Always-On Display
- DC dimming		 DCI-P3
Display test
Peak brightness (auto)
Xiaomi 15 Ultra
1599 nits
Xiaomi Poco X4 GT
600 nits
sRGB gamut99.7 %97.9 %
PWM (Flicker)120 Hz51540 Hz
Response time1 ms24 ms
Contrast∞ Infinite1573:1
Sources: NotebookCheck [Xiaomi 15 Ultra], [Xiaomi Poco X4 GT]

Design & Build

Design and ergonomics comparison
Height 161.3 mm (6.35 in) 163.64 mm (6.44 in)
Width 75.3 mm (2.96 in) 74.29 mm (2.92 in)
Thickness 9.35 mm (0.37 in) 8.87 mm (0.35 in)
Weight 226 g (7.97 oz) 200 g (7.05 oz)
Water resistance IP68 IP53
Cooling system Vapor chamber Vapor chamber
Back panel Glass Plastic
Frame Metal Plastic
Colors - White
- Black
- Silver
- Green		 - Black
- Silver
- Blue
Fingerprint sensor Yes In-Display Yes In-Button
Screen-to-body ratio
Xiaomi 15 Ultra
90 %
Xiaomi Poco X4 GT
86.5 %

Performance

Testing Xiaomi 15 Ultra and Xiaomi Poco X4 GT In benchmarks
Processor
Chipset Qualcomm Snapdragon 8 Elite MediaTek Dimensity 8100
Max Frequency 4320 MHz 2850 MHz
CPU Cores 8 (2 + 6) 8 (4 + 4)
Architecture - 6/3.53 (Oryon (Phoenix M))
- 2/4.32 (Oryon (Phoenix L))		 - 4/2 (Cortex-A55)
- 4/2.85 (Cortex-A78)
Process TSMC TSMC
Transistor Size 3 nm 5 nm
Neural Processor Hexagon MediaTek APU 580
Graphics Adreno 830 Mali-G610 MP6
GPU Cores 1536 768
GPU Frequency 1100 MHz 860 MHz
FLOPS 3379.2 GFLOPS 1309 GFLOPS
GeekBench v6
Geekbench 6 (Single-Core)
Xiaomi 15 Ultra
3008
Xiaomi Poco X4 GT
1072
Geekbench 6 (Multi-Core)
Xiaomi 15 Ultra
9065
Xiaomi Poco X4 GT
3360
Geekbench 6 (Single-Core)30081072
Geekbench 6 (Multi-Core)90653360
Sources: Geekbench v6 [Xiaomi 15 Ultra], [Xiaomi Poco X4 GT]
AnTuTu 10
AnTuTu 10
Xiaomi 15 Ultra
2544373
Xiaomi Poco X4 GT
828511
CPU558586244579
GPU1040161203775
Memory520300177719
UX425326202438
NanoReview Score2544373828511
3DMark Wild Life
3DMark Wild Life
Xiaomi 15 Ultra
n/a
Xiaomi Poco X4 GT
5845
Max Surface Temp.n/a38.8 °C
Stabilityn/a62 %
Graphics Testn/a35 fps
Graphics Scoren/a5845
Sources: 3DMark [Xiaomi Poco X4 GT]
PCMark 3.0
PCMark 3.0
Xiaomi 15 Ultra
n/a
Xiaomi Poco X4 GT
12424
Writing scoren/a17960
Web scoren/a11243
Video editingn/a6914
Data manipulationn/a10319
NanoReview Scoren/a12424

Memory

RAM
RAM Size 12 GB 8 GB
Memory Type LPDDR5X LPDDR5
Memory Frequency 5333 MHz n/a
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 5080 mAh
Max Charging Power 90 W 67 W
Battery Type Silicon Carbon (Si/C) Li-Po
Removable No No
Wireless Charging Yes (80 W) No
Reverse Charging Yes (Wireless) No
Fast Charging Yes (72% in 30 min) Yes (50% in 20 min)
Full Charge Time 0:51 h 0:57 h
Battery Life Test
Battery Life
Xiaomi 15 Ultra
30:03
Xiaomi Poco X4 GT
24:29
Web Browsing12:19 h09:53 h
Video Playback18:43 h14:28 h
Games06:45 h05:53 h
Standby Mode141 h119 h

Main camera

Matrix 50 MP 64 MP
Photo resolution 8192x6144 pixels 9248x6936 pixels
Zoom Optical, 4.3x Digital
Flash Dual LED Dual LED
Stabilization Optical Digital
8K Recording Yes (Up to 30 fps) No
4K Recording Yes (Up to 120 fps) Yes (Up to 30 fps)
1080p Recording Yes (Up to 60 fps) Yes (Up to 60 fps)
Slow Motion 1920 fps (1080p) n/a
Wide-angle lens 115 ° 120 °
Lenses count Standard: 50 MP
Telephoto: 200 MP
Telephoto: 50 MP
Ultra-wide: 50 MP
Depth		 Standard: 64 MP
Ultra-wide: 8 MP
Macro: 2 MP
Features - Bokeh effect
- Pro mode
- RAW support		 - Bokeh effect
- Pro mode
Main lens
Matrix50 MP64 MP
Aperturef/1.63f/1.9
Focal length23 mmn/a
SensorSony LYT-900Samsung Bright S5KGW1
Sensor size1/1.01/1.72
Pixel size1.6 μm0.8 μm
AutofocusLaser autofocusPhase autofocus
StabilizationOpticalDigital
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 MP8 MP
Aperturef/2.2f/2.2
Focal length14 mmn/a
SensorSamsung S5KJN5n/a
Sensor size1/2.761/4.0
Pixel size0.64 μmn/a
StabilizationDigitalDigital
Main camera DxOMark results
Photo quality
Xiaomi 15 Ultra
158
Xiaomi Poco X4 GT
n/a
Video quality
Xiaomi 15 Ultra
134
Xiaomi Poco X4 GT
n/a
Overall camera score
Xiaomi 15 Ultra
153
Xiaomi Poco X4 GT
n/a
Bokeh80n/a
Preview89n/a
Sources: DxOMark [Xiaomi 15 Ultra]

Front camera

Matrix 32 MP 16 MP
Photo resolution 6528x4896 pixels 4608x3456 pixels
Aperture f/2.0 f/2.45
Focal length 22 mm n/a
Sensor Omnivision OV32B Sony IMX596
Sensor size 1/3.14 1/2
Pixel size 0.7 μm 0.8 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 6 (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 5.3
Bluetooth features LE LE, HID, A2DP
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
- QZSS
NFC* Yes Varies by region
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 1900MHz
3G BandsWCDMA 1/2/4/5/6/8/19WCDMA B1/2/4/5/8
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/B20/B28/B38/B40/B41)
5G SupportYesYes

Sound

Speakers n/a Stereo
3.5 mm Jack No Yes
FM Radio No Yes
Dolby Atmos Yes Yes
Speaker Test
Max Volume
Xiaomi 15 Ultra
92.1 dB
Xiaomi Poco X4 GT
86.1 dB

Other

Class Flagship Mid-range
Announced February, 2025 yr June, 2022 yr
Release Date February, 2025 yr June, 2022 yr
Launch Price ($) n/a 379
MSRP ($) 1099 n/a
Sensors - Barometer
- Proximity Sensor
- Gyroscope
- Accelerometer
- Ambient Light Sensor
- Compass
- Fingerprint sensor		 - Proximity 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

Which smartphone would you pick?
0 (0%)
0 (0%)
Total Votes: 0

User comments

Share your opinion or ask questions below