Vivo X300 Ultra vs Xiaomi 15 Ultra
The Vivo X300 Ultra (2026) runs on the Qualcomm Snapdragon 8 Elite Gen 5, while the Xiaomi 15 Ultra (2025) runs on the Qualcomm Snapdragon 8 Elite; launch prices were $950 and $999. By overall MobileRank rating, the Vivo X300 Ultra leads — 91/100 vs 85/100 (a 6-point difference). Key differences: the Vivo X300 Ultra has the bigger battery (7000 mAh vs 6000); the main camera is 200 MP vs 50 MP; the Vivo X300 Ultra is faster in AnTuTu (4,247,433 vs 3,030,376); per DXOMark lab testing, the Vivo X300 Ultra has the stronger camera (170 vs 159); the Vivo X300 Ultra is thinner (8.2mm vs 9.4mm).
Profile comparison
Category scores
Vivo X300 Ultra
Xiaomi 15 Ultra
What makes Vivo X300 Ultra better?
- Higher AnTuTu: 4247433 vs 3030376
- Better Geekbench Single: 3639 vs 3050
- Better Geekbench Multi: 11047 vs 10200
- Bigger battery: 7000 vs 6000 mAh
- Faster charging: 100W vs 90W
- Better main camera: 200MP vs 50MP
- Cheaper at launch: $950 vs $999
- Higher performance (99/100 vs 92/100)
- Better camera (96/100 vs 87/100)
- Longer battery life (85/100 vs 80/100)
- Better portability (39/100 vs 29/100)
What makes Xiaomi 15 Ultra better?
- Faster wireless charging: 50W vs 40W
- Lighter: 225g vs 230g
- Better display (90/100 vs 89/100)
Comparison verdict
Comparing the Vivo X300 Ultra vs the Xiaomi 15 Ultra, the Vivo X300 Ultra scores 6 points higher (91/100 vs 85/100). Value score: Vivo X300 Ultra — 94/100, Xiaomi 15 Ultra — 80/100; it shows how far a model sits above or below the usual level for its price, and is not part of the overall rating. In the "performance" category, the Vivo X300 Ultra is a bit better (99/100 vs 92/100). In the "display" category, the Xiaomi 15 Ultra and the Vivo X300 Ultra are nearly equal (90/100 vs 89/100). In the "camera" category, the Vivo X300 Ultra is a bit better (96/100 vs 87/100). In the "battery" category, the Vivo X300 Ultra is a bit better (85/100 vs 80/100). In the "portability" category, the Vivo X300 Ultra is a bit better (39/100 vs 29/100).
Specs comparison
| Specification | Vivo X300 Ultra | Xiaomi 15 Ultra | |
|---|---|---|---|
| Processor | Qualcomm Snapdragon 8 Elite Gen 5 | Qualcomm Snapdragon 8 Elite | |
| AnTuTu | 4247433 | 3030376 | |
| Geekbench Single | 3639 | 3050 | |
| Geekbench Multi | 11047 | 10200 | |
| Display | 6.8" LTPO OLED | 6.7" LTPO AMOLED | |
| Resolution | 3168x1440 | 3200x1440 | |
| Refresh rate | 120 Hz | 120 Hz | |
| Battery | 7000 mAh | 6000 mAh | |
| Charging | 100W | 90W | |
| Wireless charging | 40W | 50W | |
| DXOMark (camera) | 170 | 159 | |
| Main camera | 200 MP | 50 MP | |
| Ultrawide | 50 MP | 50 MP | |
| Telephoto | 200 MP | 50 MP | |
| Front camera | 32 MP | 32 MP | |
| RAM | 12GB / 16GB | 16GB | |
| Storage | 256GB / 512GB / 1TB | 256GB / 512GB / 1TB | |
| OS | Android 16 | Android 15 / HyperOS 2 | |
| Brightness (peak) | — | 3200 nits | |
| NFC | yes | yes | |
| Protection | IP69 | IP68 | |
| Dimensions | 163.0×76.8×8.2 mm | 161.3×75.3×9.4 mm | |
| Weight | 230 g | 225 g | |
| Launch price | $950 | $999 |
Camera comparison
Vivo X300 Ultra
- Main: 200MP f/1.6
- Ultrawide: 50MP
- Telephoto: 200MP
- Front: 32MP
Xiaomi 15 Ultra
- Main: 50MP f/1.63
- Ultrawide: 50MP
- Telephoto: 50MP
- Front: 32MP
Display comparison
Vivo X300 Ultra
- 6.8" LTPO OLED
- Resolution: 3168x1440
- Refresh rate: 120 Hz
Xiaomi 15 Ultra
- 6.7" LTPO AMOLED
- Resolution: 3200x1440
- Refresh rate: 120 Hz
Battery and charging
Vivo X300 Ultra
- 7000 mAh
- NanoReview test: web browsing 10:18 hrs, total 29:11 hrs
- Wired: 100W
- Wireless: 40W
Xiaomi 15 Ultra
- 6000 mAh
- NanoReview test: web browsing 12:19 hrs, total 30:03 hrs
- Wired: 90W
- Wireless: 50W
Overall performance score
We compared Vivo X300 Ultra and Xiaomi 15 Ultra, covering their specs and all relevant benchmarks.
Vivo X300 Ultra leads Xiaomi 15 Ultra by 40.2% in our overall performance rating.
Benchmarks
Launch prices and where to check today's
Launch price difference: $49. Vivo X300 Ultra was $49 cheaper at launch.
Detailed category analysis
performance
In the "performance" category, the Vivo X300 Ultra is a bit better (99/100 vs 92/100).
display
In the "display" category, the Xiaomi 15 Ultra and the Vivo X300 Ultra are nearly equal (90/100 vs 89/100).
camera
In the "camera" category, the Vivo X300 Ultra is a bit better (96/100 vs 87/100).
battery
In the "battery" category, the Vivo X300 Ultra is a bit better (85/100 vs 80/100).
portability
In the "portability" category, the Vivo X300 Ultra is a bit better (39/100 vs 29/100).
Frequently asked questions
Which is better: the Vivo X300 Ultra or the Xiaomi 15 Ultra?
The Vivo X300 Ultra edges out the Xiaomi 15 Ultra by just 6 points — the two devices are very close in overall level.
What is the rating of the Vivo X300 Ultra and the Xiaomi 15 Ultra?
The Vivo X300 Ultra has a MobileRank rating of 91/100, the Xiaomi 15 Ultra — 85/100.
Which has the better camera: the Vivo X300 Ultra or the Xiaomi 15 Ultra?
The Vivo X300 Ultra leads on camera score (96/100 vs 87/100).
Which is more powerful: the Vivo X300 Ultra or the Xiaomi 15 Ultra?
The Vivo X300 Ultra leads on performance (99/100 vs 92/100).
Should you choose the Vivo X300 Ultra over the Xiaomi 15 Ultra?
The Vivo X300 Ultra is a better fit for gamers and power users, mobile photography enthusiasts, those who care about battery life, budget-conscious buyers. The Xiaomi 15 Ultra is a better fit for gamers and power users, mobile photography enthusiasts, those who care about battery life, budget-conscious buyers.