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

Xiaomi 15 Ultra vs Vivo iQOO 15

95 out 100
Xiaomi 15 Ultra
VS
94 out 100
Vivo iQOO 15
Xiaomi 15 Ultra
Vivo iQOO 15

Compared 2 smartphones : Xiaomi 15 Ultra Manufactured in February, 2025, with display 6.73 with chipsetQualcomm Snapdragon 8 Elite, vs Vivo iQOO 15, Manufactured in October, 2025with 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 15 Ultra
  • Higher pixel density: 522ppi
  • Supports Dolby Atmos
  • Built-in eSIM
Reasons to choose Vivo iQOO 15
  • Larger display: 6.85in
  • Higher refresh rate: 144Hz
  • Lighter design: 220g vs 226g
  • Higher battery capacity: 7000mAh vs 5410mAh

Versions

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

Review

Key Specs Xiaomi 15 Ultra 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 15 Ultra
vs
Vivo iQOO 15

Display

Display quality comparison
Type AMOLED AMOLED
Size 6.73 in 6.85 in
Resolution 1440x3200 pixels 1440x3168 pixels
Aspect ratio 20:9 20:9
Pixel density 522 ppi 508 ppi
Refresh rate 120 Hz 144 Hz
Adaptive refresh rate Yes (1-120 Hz) Yes (1-120 Hz)
Max brightness n/a 2600 nits
HDR support Yes Dolby Vision Yes, HDR10+
Touch Sampling Rate 300 Hz n/a
Screen-to-body ratio 90 % 90.2 %
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
Vivo iQOO 15
n/a
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) 163.65 mm (6.44 in)
Width 75.3 mm (2.96 in) 76.8 mm (3.02 in)
Thickness 9.35 mm (0.37 in) 8.1 mm (0.32 in)
Weight 226 g (7.97 oz) 220 g (7.76 oz)
Water resistance IP68 IP69
Cooling system Vapor chamber Vapor chamber
Back panel Glass n/a
Frame Metal Metal
Colors - White
- Black
- Silver
- Green		 - White
- Black
- Blue
Fingerprint sensor Yes In-Display Yes, In-Display
Screen-to-body ratio
Xiaomi 15 Ultra
90 %
Vivo iQOO 15
90.2 %

Performance

Testing Xiaomi 15 Ultra and Vivo iQOO 15 In benchmarks
Processor
Chipset Qualcomm Snapdragon 8 Elite Qualcomm Snapdragon 8 Elite Gen 5
Max Frequency 4320 MHz 4600 MHz
CPU Cores 8 (2 + 6) 8 (2 + 6)
Architecture - 6/3.53 (Oryon (Phoenix M))
- 2/4.32 (Oryon (Phoenix L))		 6/3.63 ()
Process TSMC TSMC
Transistor Size 3 nm 3 nm
Neural Processor Hexagon Hexagon
Graphics Adreno 830 Adreno 840
GPU Cores 1536 1536
GPU Frequency 1100 MHz 1200 MHz
FLOPS 3379.2 GFLOPS 3686.4 GFLOPS
GeekBench v6
Geekbench 6 (Single-Core)
Xiaomi 15 Ultra
3008
Vivo iQOO 15
3641
Geekbench 6 (Multi-Core)
Xiaomi 15 Ultra
9065
Vivo iQOO 15
10982
Geekbench 6 (Single-Core)30083641
Geekbench 6 (Multi-Core)906510982
Geekbench Compute (GPU)n/a27923
Sources: Geekbench v6 [Xiaomi 15 Ultra], [Vivo iQOO 15]
AnTuTu 10
AnTuTu 10
Xiaomi 15 Ultra
2544373
Vivo iQOO 15
4009400
CPU5585861102463
GPU10401611429688
Memory520300516447
UX425326960802
NanoReview Score25443734009400

Memory

RAM
RAM Size 12 GB 12 GB
Memory Type LPDDR5X LPDDR5X
Memory Frequency 5333 MHz 5300 MHz
Channels 2 4
Storage
Storage Capacity256 GB256 GB
Storage TypeUFS 4.1UFS 4.1
Memory CardNoNo

Software

OS Android 15 Android 16
OS Size 23.9 GB n/a
UI Skin HyperOS 2.0 OriginOS 6

Battery

Volume 5410 mAh 7000 mAh
Max Charging Power 90 W 100 W
Battery Type Silicon Carbon (Si/C) Silicon Carbon (Si/C)
Removable No No
Wireless Charging Yes (80 W) Yes (40 W)
Reverse Charging Yes (Wireless) No
Fast Charging Yes (72% in 30 min) Yes
Full Charge Time 0:51 h n/a
Battery Life Test
Battery Life
Xiaomi 15 Ultra
30:03
Vivo iQOO 15
n/a
Web Browsing12:19 hn/a
Video Playback18:43 hn/a
Games06:45 hn/a
Standby Mode141 hn/a

Main camera

Matrix 50 MP 50 MP
Photo resolution 8192x6144 pixels 8192x6144 pixels
Zoom Optical, 4.3x Optical, 3x
Flash Dual LED Dual LED
Stabilization Optical Optical
8K Recording Yes (Up to 30 fps) Yes (Up to 30 fps)
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) 240 fps (1080p)
Wide-angle lens 115 ° n/a
Lenses count Standard: 50 MP
Telephoto: 200 MP
Telephoto: 50 MP
Ultra-wide: 50 MP
Depth		 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/1.63f/1.9
Focal length23 mm23 mm
SensorSony LYT-900n/a
Sensor size1/1.01/1.56
Pixel size1.6 μm1 μm
AutofocusLaser autofocusPhase autofocus
StabilizationOpticalOptical
Telephoto
Matrix200 MP50 MP
Aperturef/2.6f/2.7
Focal length100 mmn/a
SensorSamsung ISOCELL S5KHP9n/a
Sensor size1/1.41/1.95
Pixel size0.56 μm0.8 μm
StabilizationOpticalOptical
Ultra-wide lens
Matrix50 MP50 MP
Aperturef/2.2f/2.1
Focal length14 mm15 mm
SensorSamsung S5KJN5n/a
Sensor size1/2.761/2.76
Pixel size0.64 μm0.64 μm
StabilizationDigitalDigital
Main camera DxOMark results
Photo quality
Xiaomi 15 Ultra
158
Vivo iQOO 15
n/a
Video quality
Xiaomi 15 Ultra
134
Vivo iQOO 15
n/a
Overall camera score
Xiaomi 15 Ultra
153
Vivo iQOO 15
n/a
Bokeh80n/a
Preview89n/a
Sources: DxOMark [Xiaomi 15 Ultra]

Front camera

Matrix 32 MP 32 MP
Photo resolution 6528x4896 pixels n/a
Aperture f/2.0 f/2.2
Focal length 22 mm 21 mm
Sensor Omnivision OV32B CMOS
Sensor size 1/3.14 n/a
Pixel size 0.7 μm n/a
Autofocus No No
Stabilization Digital Digital
Video resolution 2160p (4K) at 60 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 6.0 6.0
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 Yes Yes
GPS - GPS
- GLONASS
- Beidou
- Galileo
- QZSS
- NAVIC		 - GPS
- GLONASS
- Beidou
- Galileo
- QZSS
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 850/900/1800/1900MHz
3G BandsWCDMA 1/2/4/5/6/8/19WCDMA B1/B2/B4/B5/B6/B8/B19
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/B18/B19/B20/B26/B28/B38/B40/B41/B42/B66)
5G SupportYesYes

Sound

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

Other

Class Flagship Flagship
Announced February, 2025 yr October, 2025 yr
Release Date February, 2025 yr October, 2025 yr
MSRP ($) 1099 590
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, 100 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

No clear favorite identified yet; updates may follow as new data arrives.

Survey

Which smartphone would you pick?
3 (42.86%)
4 (57.14%)
Total Votes: 7

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