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

Xiaomi Poco X4 GT vs Vivo iQOO 15

60 out 100
Xiaomi Poco X4 GT
VS
94 out 100
Vivo iQOO 15
Xiaomi Poco X4 GT
Vivo iQOO 15

Compared 2 smartphones : Xiaomi Poco X4 GT Manufactured in June, 2022, with display 6.6 with chipsetMediaTek Dimensity 8100, vs Vivo iQOO 15, Manufactured in October, 2025 with chipsetQualcomm Snapdragon 8 Elite Gen 5. 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 Poco X4 GT
  • Lighter design: 200g vs 220g
  • Supports Dolby Atmos
Reasons to choose Vivo iQOO 15
  • Larger display: 6.85in
  • Higher pixel density: 508ppi
  • Higher battery capacity: 7000mAh vs 5080mAh
  • Newer Bluetooth version: 6.0 vs 5.3
  • Supports newer USB: 3.2 vs 2
  • Supports DisplayPort

Versions

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

Review

Key Specs Xiaomi Poco X4 GT and Vivo iQOO 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:
Xiaomi Poco X4 GT
vs
Vivo iQOO 15

Display

Display quality comparison
Type IPS LCD AMOLED
Size 6.6 in 6.85 in
Resolution 1080x2460 pixels 1440x3168 pixels
Aspect ratio 20:9 20:9
Pixel density 407 ppi 508 ppi
Refresh rate 144 Hz 144 Hz
Adaptive refresh rate Yes (60-144 Hz) Yes (1-120 Hz)
Max brightness 500 nits 2600 nits
HDR support Yes Dolby Vision Yes, HDR10+
Touch Sampling Rate 270 Hz n/a
Screen-to-body ratio 86.5 % 90.2 %
Features DCI-P3 - DCI-P3
- Always-On Display
- DC dimming
Display test
Peak brightness (auto)
Xiaomi Poco X4 GT
600 nits
Vivo iQOO 15
n/a
sRGB gamut97.9 %n/a
PWM (Flicker)51540 Hzn/a
Response time24 msn/a
Contrast1573:1n/a
Sources: NotebookCheck [Xiaomi Poco X4 GT]

Design & Build

Design and ergonomics comparison
Height 163.64 mm (6.44 in) 163.65 mm (6.44 in)
Width 74.29 mm (2.92 in) 76.8 mm (3.02 in)
Thickness 8.87 mm (0.35 in) 8.1 mm (0.32 in)
Weight 200 g (7.05 oz) 220 g (7.76 oz)
Water resistance IP53 IP69
Cooling system Vapor chamber Vapor chamber
Back panel Plastic n/a
Frame Plastic Metal
Colors - Black
- Silver
- Blue		 - White
- Black
- Blue
Fingerprint sensor Yes In-Button Yes, In-Display
Screen-to-body ratio
Xiaomi Poco X4 GT
86.5 %
Vivo iQOO 15
90.2 %

Performance

Testing Xiaomi Poco X4 GT and Vivo iQOO 15 In benchmarks
Processor
Chipset MediaTek Dimensity 8100 Qualcomm Snapdragon 8 Elite Gen 5
Max Frequency 2850 MHz 4600 MHz
CPU Cores 8 (4 + 4) 8 (2 + 6)
Architecture - 4/2 (Cortex-A55)
- 4/2.85 (Cortex-A78)		 6/3.63 ()
Process TSMC TSMC
Transistor Size 5 nm 3 nm
Neural Processor MediaTek APU 580 Hexagon
Graphics Mali-G610 MP6 Adreno 840
GPU Cores 768 1536
GPU Frequency 860 MHz 1200 MHz
FLOPS 1309 GFLOPS 3686.4 GFLOPS
GeekBench v6
Geekbench 6 (Single-Core)
Xiaomi Poco X4 GT
1072
Vivo iQOO 15
3641
Geekbench 6 (Multi-Core)
Xiaomi Poco X4 GT
3360
Vivo iQOO 15
10982
Geekbench 6 (Single-Core)10723641
Geekbench 6 (Multi-Core)336010982
Geekbench Compute (GPU)n/a27923
Sources: Geekbench v6 [Xiaomi Poco X4 GT], [Vivo iQOO 15]
AnTuTu 10
AnTuTu 10
Xiaomi Poco X4 GT
828511
Vivo iQOO 15
4009400
CPU2445791102463
GPU2037751429688
Memory177719516447
UX202438960802
NanoReview Score8285114009400
3DMark Wild Life
3DMark Wild Life
Xiaomi Poco X4 GT
5845
Vivo iQOO 15
n/a
Max Surface Temp.38.8 °Cn/a
Stability62 %n/a
Graphics Test35 fpsn/a
Graphics Score5845n/a
Sources: 3DMark [Xiaomi Poco X4 GT]
PCMark 3.0
PCMark 3.0
Xiaomi Poco X4 GT
12424
Vivo iQOO 15
n/a
Writing score17960n/a
Web score11243n/a
Video editing6914n/a
Data manipulation10319n/a
NanoReview Score12424n/a

Memory

RAM
RAM Size 8 GB 12 GB
Memory Type LPDDR5 LPDDR5X
Memory Frequency n/a 5300 MHz
Channels 4 4
Storage
Storage Capacity- 128 GB
- 256 GB		256 GB
Storage TypeUFS 3.1UFS 4.1
Memory CardNoNo

Software

OS Android 12 (Upgradeable to Android 14) Android 16
UI Skin HyperOS 1.0 OriginOS 6

Battery

Volume 5080 mAh 7000 mAh
Max Charging Power 67 W 100 W
Battery Type Li-Po Silicon Carbon (Si/C)
Removable No No
Wireless Charging No Yes (40 W)
Reverse Charging No No
Fast Charging Yes (50% in 20 min) Yes
Full Charge Time 0:57 h n/a
Battery Life Test
Battery Life
Xiaomi Poco X4 GT
24:29
Vivo iQOO 15
n/a
Web Browsing09:53 hn/a
Video Playback14:28 hn/a
Games05:53 hn/a
Standby Mode119 hn/a

Main camera

Matrix 64 MP 50 MP
Photo resolution 9248x6936 pixels 8192x6144 pixels
Zoom Digital Optical, 3x
Flash Dual LED Dual LED
Stabilization Digital Optical
8K Recording No Yes (Up to 30 fps)
4K Recording Yes (Up to 30 fps) Yes (Up to 60 fps)
1080p Recording Yes (Up to 60 fps) Yes (Up to 60 fps)
Slow Motion n/a 240 fps (1080p)
Wide-angle lens 120 ° n/a
Lenses count Standard: 64 MP
Ultra-wide: 8 MP
Macro: 2 MP		 Standard: 50 MP
Telephoto: 50 MP
Ultra-wide: 50 MP
Features - Bokeh effect
- Pro mode		 - Bokeh effect
- Pro mode
- RAW support
Main lens
Matrix64 MP50 MP
Aperturef/1.9f/1.9
Focal lengthn/a23 mm
SensorSamsung Bright S5KGW1n/a
Sensor size1/1.721/1.56
Pixel size0.8 μm1 μm
AutofocusPhase autofocusPhase autofocus
StabilizationDigitalOptical
Telephoto
Matrixn/a50 MP
Aperturen/af/2.7
Sensor sizen/a1/1.95
Pixel sizen/a0.8 μm
Stabilizationn/aOptical
Ultra-wide lens
Matrix8 MP50 MP
Aperturef/2.2f/2.1
Focal lengthn/a15 mm
Sensor size1/4.01/2.76
Pixel sizen/a0.64 μm
StabilizationDigitalDigital

Front camera

Matrix 16 MP 32 MP
Photo resolution 4608x3456 pixels n/a
Aperture f/2.45 f/2.2
Focal length n/a 21 mm
Sensor Sony IMX596 CMOS
Sensor size 1/2 n/a
Pixel size 0.8 μm n/a
Autofocus No No
Stabilization Digital Digital
Video resolution 1080p (Full HD) at 60 fps 2160p (4K) at 60 fps
TOF 3D sensor No No

Connectivity

Wi-Fi version Wi-Fi 6 (802.11 a/b/g/n/ac/ax) 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 5.3 6.0
Bluetooth features LE, HID, A2DP LE
USB type USB Type-C USB Type-C
USB version 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		 - GPS
- GLONASS
- Beidou
- Galileo
- QZSS
NFC* Varies by region Yes
Infrared Port Yes Yes
Connectivity
SIM Count*22
SIM TypeNanoNano
SIM ModeDual SIM StandbyDual SIM Standby
eSIM Support *NoNo
Hybrid SlotNoNo
2G BandsGSM 850 900 1800 1900MHzGSM 850/900/1800/1900MHz
3G BandsWCDMA B1/2/4/5/8WCDMA B1/B2/B4/B5/B6/B8/B19
LTE Bands*LTE (B1/B2/B3/B4/B5/B7/B8/B20/B28/B38/B40/B41)LTE (B1/B2/B3/B4/B5/B7/B8/B18/B19/B20/B26/B28/B38/B40/B41/B42/B66)
5G SupportYesYes

Sound

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

Other

Class Mid-range Flagship
Announced June, 2022 yr October, 2025 yr
Release Date June, 2022 yr October, 2025 yr
Launch Price ($) 379 n/a
MSRP ($) n/a 590
Sensors - Proximity Sensor
- Gyroscope
- Accelerometer
- Ambient Light Sensor
- Compass
- Fingerprint sensor		 - Proximity Sensor
- Gyroscope
- Accelerometer
- Ambient Light Sensor
- Compass
- Fingerprint sensor
Charger Included Yes 67 W Yes, 100 W
* Attention! Config, frequencies, NFC, and other specs may vary by region.

Results

After analyzing the data, we consider Vivo iQOO 15 the clear winner in this comparison.

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