Xiaomi 15 Ultravsvivo X300
We compare these two popular phones to help you decide which one fits your needs and budget better.
Xiaomi 15 Ultra
#7
+14
Processor:Qualcomm Snapdragon 8 Elite
RAM:16 GBGB
Storage:512 GBGB
Quick Stats
Xiaomi 15 Ultra ensures all-day power with ultra-fast charging and a durable battery for uninterrupted performance.
Xiaomi 15 Ultra's display offers 120Hz adaptive refresh, 3200 cd/m² brightness, and HDR10+/Dolby Vision for vivid, immersive visuals.
Xiaomi 15 Ultra's quad-camera system delivers 200MP telephoto, 8K video, and AI-enhanced photography for professional-grade results.
Xiaomi 15 Ultra's Snapdragon 8 Gen 3, 16GB RAM, and HyperOS deliver flagship-tier performance with seamless multitasking and AI optimization.
vivo X300
#5
Winner
+11
Processor:MediaTek Dimensity 9500
RAM:16 GBGB
Storage:512 GBGB
Quick Stats
The vivo X300's 5255 mAh battery with 90W wired and 40W wireless charging ensures all-day use and rapid replenishment.
The vivo X300's AMOLED display delivers vibrant, sharp visuals with adaptive 1-144Hz refresh and HDR10+ support.
The vivo X300's 200MP triple-camera system offers 4K video, 960 fps slow-motion, and optical stabilization for versatile, high-quality imaging.
The vivo X300's 3 nm Dimensity 9500 and 16 GB RAM deliver flagship performance, though thermal throttling occurs under heavy use.
Specifications Comparison
Specification
Xiaomi Xiaomi 15 Ultra
vivo vivo X300
Model
Qualcomm Snapdragon 8 Elite
MediaTek Dimensity 9500
CPU
2x4.32 GHz Oryon V2 Phoenix L+ 6x3.53 GHz Oryon V2 Phoenix M
1x4,21 GHz C1 Ultra + 3x3,5 GHz C1 Premium + 4x2,7 GHz C1 Pro
Type
Octa-Core
Octa-Core
Nanometer
3 nm
3 nm
Frequency
4,3 GHz
4,2 GHz
64 Bits
Yes
Yes
GPU
Adreno 830
Mali G1 Ultra
RAM
16 GB
16 GB
Type
RAM LPDDR5X
N/A
Capacity
512 GB
512 GB
Type
UFS Storage 4.1
UFS Storage 4.1
SD slot
No
No
Fingerprint security
Yes, in screen
Yes, in screen
Fingerprint sensor
Yes
Yes
Proximity sensor
Yes
Yes
Light sensor
Yes
Yes
Accelerometer sensor
Yes
Yes
Compass sensor
Yes
Yes
Gyroscope sensor
Yes
N/A
Barometer sensor
Yes
N/A
Gravity sensor
N/A
Yes
RGB sensor
Yes
N/A
Hall sensor
N/A
Yes
Audio
Dolby Atmos, Hi-Res Audio, Stereo Speakers, 4 microphones
Hi-Res Audio, Noise cancellation microphone, Stereo Speakers, 2 microphones
Antutu Score
2746580
4005932
Antutu Version
Antutu v10
Antutu v11
Antutu Standing
Overall performance better than 98% of devices
Overall performance better than 99% of devices
Cooling system
Yes
Yes
Gaming buttons
No
No
Extras
N/A
N/A
Note: Highlighted specifications show differences between the two devices.
Rankings
Connectivity
Xiaomi 15 Ultra
#698
vivo X300
#678
Winner
Design
Xiaomi 15 Ultra
#196
vivo X300
#45
Winner
Display
Xiaomi 15 Ultra
#381
Winner
vivo X300
#549
Performance
Xiaomi 15 Ultra
#45
vivo X300
#33
Winner
Battery
Xiaomi 15 Ultra
#293
vivo X300
#264
Winner
Camera
Xiaomi 15 Ultra
#31
vivo X300
#28
Winner
| Metric | Xiaomi 15 Ultra | vivo X300 |
|---|---|---|
| Connectivity | #698 | #678 Winner |
| Design | #196 | #45 Winner |
| Display | #381 Winner | #549 |
| Performance | #45 | #33 Winner |
| Battery | #293 | #264 Winner |
| Camera | #31 | #28 Winner |
Note: Lower rank number indicates a better position in category.
Key Differences
No significant specification differences found between these devices.
Scores by Category
Pros and Cons
Xiaomi 15 Ultra
Strengths
Premium titanium alloy and reinforced glass build with IP68 water/dust resistance for durability
90W fast charging and 80W wireless charging for ultra-rapid power replenishment
50MP quad-camera system with 200MP telephoto, 8K video, and AI-enhanced photography
6.7" 120Hz AMOLED display with 3200 cd/m² brightness, HDR10+, and Dolby Vision
Snapdragon 8 Gen 3, 16GB RAM, and UFS 4.0 storage for flagship-tier performance
Weaknesses
227g weight may feel heavy for some users
Front camera lacks autofocus, limiting portrait mode flexibility
Non-removable battery restricts DIY replacement options
Satellite communication feature limited to China-market version
vivo X300
Strengths
Premium build quality with IP68 durability, sleek aluminum frame, and vibrant display design.
Flagship performance via 3 nm Dimensity 9500 processor and 16 GB RAM, achieving high Antutu scores.
Triple-camera system with 200MP main sensor, 4K video, and 960 fps slow-motion for versatile photography.
Fast 90W wired and 40W wireless charging with large 5255 mAh battery for all-day usage.
Adaptive 1-144 Hz AMOLED display with HDR10+, 461 PPI, and eye-comfort certifications for immersive visuals.
Weaknesses
Thermal throttling under heavy multitasking or gaming due to thermal management limitations.
Lacks LiDAR, barometric sensors, and 3.5x optical zoom found in the Pro model for advanced imaging.
Slight oversaturation in vibrant scenes and absence of a 3.5mm headphone jack.
Higher price point (€1,099) may deter budget-conscious buyers despite competitive flagship features.
Read Full Reviews
Xiaomi 15 Ultra
Xiaomi 15 Ultra: Sleek, premium design meets immersive AMOLED display and quad-camera system for cinematic photography. Power-packed battery with ultra-fast charging and cutting-edge performance.
vivo X300
vivo X300 flagship blends premium design, advanced imaging, and vibrant display for photography enthusiasts. Power-packed performance and fast charging ensure seamless 2025 smartphone experience.
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