Vivo X300 Ultra vs Xiaomi 15
The Vivo X300 Ultra (2026) runs on the Qualcomm Snapdragon 8 Elite Gen 5, while the Xiaomi 15 (2025) runs on the Qualcomm Snapdragon 8 Elite; launch prices were $950 and $635. By overall MobileRank rating, the Vivo X300 Ultra leads — 91/100 vs 82/100 (a 9-point difference). Key differences: the Vivo X300 Ultra has the bigger battery (7000 mAh vs 5240); the main camera is 200 MP vs 50 MP; the Vivo X300 Ultra is faster in AnTuTu (4,247,433 vs 2,923,262); per DXOMark lab testing, the Vivo X300 Ultra has the stronger camera (170 vs 147); the Xiaomi 15 is noticeably lighter (191g vs 230g).
Vivo X300 Ultra
Xiaomi 15
- Higher AnTuTu: 4247433 vs 2923262
- Better Geekbench Single: 3640 vs 3092
- Better Geekbench Multi: 11033 vs 9147
- Bigger battery: 7000 vs 5240 mAh
- Faster charging: 100W vs 90W
- Better main camera: 200MP vs 50MP
- Higher performance (99/100 vs 91/100)
- Better camera (96/100 vs 78/100)
- Longer battery life (85/100 vs 77/100)
- Better display (89/100 vs 85/100)
- Faster wireless charging: 50W vs 40W
- Lighter: 191g vs 230g
- Cheaper at launch: $635 vs $950
- Better portability (60/100 vs 39/100)
Comparing the Vivo X300 Ultra vs the Xiaomi 15, the Vivo X300 Ultra scores 9 points higher (91/100 vs 82/100). In the "camera" category, the Vivo X300 Ultra leads (96/100 vs 78/100). Value score: Vivo X300 Ultra — 94/100, Xiaomi 15 — 76/100; it is biased by price level, so it should not be compared directly between devices at different prices. In the "performance" category, the Vivo X300 Ultra is a bit better (99/100 vs 91/100). In the "display" category, the Vivo X300 Ultra and the Xiaomi 15 are nearly equal (89/100 vs 85/100). In the "camera" category, the Vivo X300 Ultra notably outperforms the Xiaomi 15 (96/100 vs 78/100). In the "battery" category, the Vivo X300 Ultra is a bit better (85/100 vs 77/100). In the "portability" category, the Xiaomi 15 notably outperforms the Vivo X300 Ultra (60/100 vs 39/100).
| Specification | Vivo X300 Ultra | Xiaomi 15 | |
|---|---|---|---|
| Processor | Qualcomm Snapdragon 8 Elite Gen 5 | Qualcomm Snapdragon 8 Elite | |
| AnTuTu | 4247433 | 2923262 | |
| Geekbench Single | 3640 | 3092 | |
| Geekbench Multi | 11033 | 9147 | |
| Display | 6.8" LTPO OLED | 6.4" LTPO AMOLED | |
| Resolution | 3168x1440 | 2670x1200 | |
| Refresh rate | 120 Hz | 120 Hz | |
| Battery | 7000 mAh | 5240 mAh | |
| Charging | 100W | 90W | |
| Wireless charging | 40W | 50W | |
| DXOMark (camera) | 170 | 147 | |
| 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 | 12GB / 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 | 152.3×71.2×8.4 mm | |
| Weight | 230 g | 191 g | |
| Launch price | $950 | $635 |
Vivo X300 Ultra
- Main: 200MP f/f/1.6
- Ultrawide: 50MP
- Telephoto: 200MP
- Front: 32MP
Xiaomi 15
- Main: 50MP f/f/1.6
- Ultrawide: 50MP
- Telephoto: 50MP
- Front: 32MP
Vivo X300 Ultra
- 6.8" LTPO OLED
- Resolution: 3168x1440
- Refresh rate: 120 Hz
Xiaomi 15
- 6.4" LTPO AMOLED
- Resolution: 2670x1200
- Refresh rate: 120 Hz
Vivo X300 Ultra
- 7000 mAh
- NanoReview test: web browsing 10:18 hrs, total 29:11 hrs
- Wired: 100W
- Wireless: 40W
Xiaomi 15
- 5240 mAh
- NanoReview test: web browsing 13:20 hrs, total 31:54 hrs
- Wired: 90W
- Wireless: 50W
We compared Vivo X300 Ultra and Xiaomi 15, covering their specs and all relevant benchmarks.
Vivo X300 Ultra leads Xiaomi 15 by 45.3% in our overall performance rating.
Launch price difference: $315. Xiaomi 15 was $315 cheaper at launch.
performance
In the "performance" category, the Vivo X300 Ultra is a bit better (99/100 vs 91/100).
display
In the "display" category, the Vivo X300 Ultra and the Xiaomi 15 are nearly equal (89/100 vs 85/100).
camera
In the "camera" category, the Vivo X300 Ultra notably outperforms the Xiaomi 15 (96/100 vs 78/100).
battery
In the "battery" category, the Vivo X300 Ultra is a bit better (85/100 vs 77/100).
portability
In the "portability" category, the Xiaomi 15 notably outperforms the Vivo X300 Ultra (60/100 vs 39/100).
Which is better: the Vivo X300 Ultra or the Xiaomi 15?
The Vivo X300 Ultra edges out the Xiaomi 15 by just 9 points — the two devices are very close in overall level.
What is the rating of the Vivo X300 Ultra and the Xiaomi 15?
The Vivo X300 Ultra has a MobileRank rating of 91/100, the Xiaomi 15 — 82/100.
Which has the better camera: the Vivo X300 Ultra or the Xiaomi 15?
The Vivo X300 Ultra leads on camera score (96/100 vs 78/100).
Which is more powerful: the Vivo X300 Ultra or the Xiaomi 15?
The Vivo X300 Ultra leads on performance (99/100 vs 91/100).
Should you choose the Vivo X300 Ultra over the Xiaomi 15?
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 is a better fit for gamers and power users, those who care about battery life, budget-conscious buyers.