Home Phone comparison Xiaomi 15 Ultra and Vivo X300 Pro - Which is better?

Xiaomi 15 Ultra vs Vivo X300 Pro

95 out 100
Xiaomi 15 Ultra
VS
90 out 100
Vivo X300 Pro
Xiaomi 15 Ultra
Vivo X300 Pro

Compared 2 smartphones : Xiaomi 15 Ultra Manufactured in February, 2025, with display 6.73 with chipsetQualcomm Snapdragon 8 Elite, vs Vivo X300 Pro, Manufactured in October, 2025with chipsetMediaTek Dimensity 9500. 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
  • Newer Bluetooth version: 6.0 vs 5.4
  • Supports Dolby Atmos
Reasons to choose Vivo X300 Pro
  • Larger display: 6.78in
  • Higher battery capacity: 6510mAh vs 5410mAh

Versions

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

Review

Key Specs Xiaomi 15 Ultra and Vivo X300 Pro
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 X300 Pro

Display

Display quality comparison
Type AMOLED AMOLED
Size 6.73 in 6.78 in
Resolution 1440x3200 pixels 1260x2800 pixels
Aspect ratio 20:9 20:9
Pixel density 522 ppi 452 ppi
Refresh rate 120 Hz 120 Hz
Adaptive refresh rate Yes (1-120 Hz) Yes (1-120 Hz)
Max brightness n/a 2000 nits
HDR support Yes Dolby Vision Yes, Dolby Vision
Touch Sampling Rate 300 Hz 300 Hz
Screen-to-body ratio 90 % 90.8 %
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 X300 Pro
2611 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) 161.98 mm (6.38 in)
Width 75.3 mm (2.96 in) 75.48 mm (2.97 in)
Thickness 9.35 mm (0.37 in) 7.99 mm (0.31 in)
Weight 226 g (7.97 oz) 226 g (7.97 oz)
Water resistance IP68 IP69
Cooling system Vapor chamber Vapor chamber
Back panel Glass Glass
Frame Metal Metal
Colors - White
- Black
- Silver
- Green		 - White
- Black
- Blue
- Brown
Fingerprint sensor Yes In-Display Yes, In-Display
Screen-to-body ratio
Xiaomi 15 Ultra
90 %
Vivo X300 Pro
90.8 %

Performance

Testing Xiaomi 15 Ultra and Vivo X300 Pro In benchmarks
Processor
Chipset Qualcomm Snapdragon 8 Elite MediaTek Dimensity 9500
Max Frequency 4320 MHz 4210 MHz
CPU Cores 8 (2 + 6) 8 (1 + 3 + 4)
Architecture - 6/3.53 (Oryon (Phoenix M))
- 2/4.32 (Oryon (Phoenix L))		 - 4/2.7 (C1-Pro)
- 3/3.5 (C1-Premium)
- 1/4.21 (C1-Ultra)
Process TSMC TSMC
Transistor Size 3 nm 3 nm
Neural Processor Hexagon MediaTek NPU 990
Graphics Adreno 830 Mali-G1 Ultra MP12
GPU Cores 1536 1536
GPU Frequency 1100 MHz 1716 MHz
FLOPS 3379.2 GFLOPS 5271.5 GFLOPS
GeekBench v6
Geekbench 6 (Single-Core)
Xiaomi 15 Ultra
3008
Vivo X300 Pro
3447
Geekbench 6 (Multi-Core)
Xiaomi 15 Ultra
9065
Vivo X300 Pro
10378
Geekbench 6 (Single-Core)30083447
Geekbench 6 (Multi-Core)906510378
Geekbench Compute (GPU)n/a25723
Sources: Geekbench v6 [Xiaomi 15 Ultra], [Vivo X300 Pro]
AnTuTu 10
AnTuTu 10
Xiaomi 15 Ultra
2544373
Vivo X300 Pro
4011932
CPU5585861043247
GPU10401611510982
Memory520300667254
UX425326790449
NanoReview Score25443734011932

Memory

RAM
RAM Size 12 GB 12 GB
Memory Type LPDDR5X LPDDR5X
Memory Frequency 5333 MHz 5333 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 6510 mAh
Max Charging Power 90 W 90 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) Yes, (Wireless)
Fast Charging Yes (72% in 30 min) Yes (55% in 15 min)
Full Charge Time 0:51 h 0:29 h
Battery Life Test
Battery Life
Xiaomi 15 Ultra
30:03
Vivo X300 Pro
20:40
Web Browsing12:19 h08:45 h
Video Playback18:43 h14:55 h
Games06:45 h06:08 h
Standby Mode141 h81 h

Main camera

Matrix 50 MP 50 MP
Photo resolution 8192x6144 pixels 8192x6144 pixels
Zoom Optical, 4.3x Optical, 3.7x
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 120 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 ° 119 °
Lenses count Standard: 50 MP
Telephoto: 200 MP
Telephoto: 50 MP
Ultra-wide: 50 MP
Depth		 Standard: 50 MP
Telephoto: 200 MP
Ultra-wide: 50 MP
Features - Bokeh effect
- Pro mode
- RAW support		 - Bokeh effect
- Pro mode
Main lens
Matrix50 MP50 MP
Aperturef/1.63f/1.6
Focal length23 mm24 mm
SensorSony LYT-900Sony LYT-828
Sensor size1/1.01/1.28
Pixel size1.6 μm1.22 μm
AutofocusLaser autofocusLaser autofocus
StabilizationOpticalOptical
Telephoto
Matrix200 MP200 MP
Aperturef/2.6f/2.7
Focal length100 mm85 mm
SensorSamsung ISOCELL S5KHP9Samsung ISOCELL HPB
Sensor size1/1.41/1.4
Pixel size0.56 μm0.56 μm
StabilizationOpticalOptical
Ultra-wide lens
Matrix50 MP50 MP
Aperturef/2.2f/2.0
Focal length14 mm15 mm
SensorSamsung S5KJN5Samsung S5KJN1
Sensor size1/2.761/2.76
Pixel size0.64 μm0.64 μm
StabilizationDigitalDigital
Main camera DxOMark results
Photo quality
Xiaomi 15 Ultra
158
Vivo X300 Pro
n/a
Video quality
Xiaomi 15 Ultra
134
Vivo X300 Pro
n/a
Overall camera score
Xiaomi 15 Ultra
153
Vivo X300 Pro
n/a
Bokeh80n/a
Preview89n/a
Sources: DxOMark [Xiaomi 15 Ultra]

Front camera

Matrix 32 MP 50 MP
Photo resolution 6528x4896 pixels 8192x6144 pixels
Aperture f/2.0 f/2.0
Focal length 22 mm n/a
Sensor Omnivision OV32B Samsung S5KJN1
Sensor size 1/3.14 1/2.76
Pixel size 0.7 μm 0.64 μm
Autofocus No Phase autofocus
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 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 Yes Yes
GPS - GPS
- GLONASS
- Beidou
- Galileo
- QZSS
- NAVIC		 - GPS
- GLONASS
- Beidou
- Galileo
- QZSS
- NAVIC
NFC* Yes Yes
Infrared Port Yes Yes
Connectivity
SIM Count*22
SIM TypeNanoNano
SIM ModeDual SIM StandbyDual SIM Standby
eSIM Support *YesYes
Hybrid SlotNoNo
2G BandsGSM 2/3/5/8GSM 850/900/1800/1900 MHz
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/B25/B26/B28/B34/B38/B39/B40/B41/B42/B43/B48/B66)
5G SupportYesYes

Sound

3.5 mm Jack No No
FM Radio No No
Dolby Atmos Yes No
Speaker Test
Max Volume
Xiaomi 15 Ultra
92.1 dB
Vivo X300 Pro
n/a

Other

Class Flagship Flagship
Announced February, 2025 yr October, 2025 yr
Release Date February, 2025 yr October, 2025 yr
MSRP ($) 1099 899
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, 90 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?
14 (58.33%)
10 (41.67%)
Total Votes: 24

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