Vivo iQOO 15 Ultra vs Xiaomi 15
The Vivo iQOO 15 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 $799 and $635. By overall MobileRank rating, the Vivo iQOO 15 Ultra leads — 89/100 vs 82/100 (a 7-point difference). Key differences: the Vivo iQOO 15 Ultra has the bigger battery (7400 mAh vs 5240); the Vivo iQOO 15 Ultra is faster in AnTuTu (4,602,290 vs 2,914,100); the Xiaomi 15 is noticeably lighter (191g vs 227g).
Profile comparison
Category scores
Vivo iQOO 15 Ultra
Xiaomi 15
What makes Vivo iQOO 15 Ultra better?
- Higher AnTuTu: 4602290 vs 2914100
- Better Geekbench Single: 3639 vs 3092
- Better Geekbench Multi: 11047 vs 9147
- Bigger battery: 7400 vs 5240 mAh
- Faster charging: 120W vs 90W
- Higher refresh rate: 144Hz vs 120Hz
- Higher performance (99/100 vs 91/100)
- Longer battery life (92/100 vs 77/100)
- Better display (99/100 vs 85/100)
What makes Xiaomi 15 better?
- Lighter: 191g vs 227g
- Cheaper at launch: $635 vs $799
- Better portability (60/100 vs 35/100)
Comparison verdict
Comparing the Vivo iQOO 15 Ultra vs the Xiaomi 15, the Vivo iQOO 15 Ultra scores 7 points higher (89/100 vs 82/100). In the "battery" category, the Vivo iQOO 15 Ultra leads (92/100 vs 77/100). Value score: Vivo iQOO 15 Ultra — 92/100, Xiaomi 15 — 78/100; 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 iQOO 15 Ultra is a bit better (99/100 vs 91/100). In the "display" category, the Vivo iQOO 15 Ultra is a bit better (99/100 vs 85/100). In the "camera" category, both devices are on the same level — 78/100. In the "battery" category, the Vivo iQOO 15 Ultra notably outperforms the Xiaomi 15 (92/100 vs 77/100). In the "portability" category, the Xiaomi 15 notably outperforms the Vivo iQOO 15 Ultra (60/100 vs 35/100).
Specs comparison
| Specification | Vivo iQOO 15 Ultra | Xiaomi 15 | |
|---|---|---|---|
| Processor | Qualcomm Snapdragon 8 Elite Gen 5 | Qualcomm Snapdragon 8 Elite | |
| AnTuTu | 4602290 | 2914100 | |
| Geekbench Single | 3639 | 3092 | |
| Geekbench Multi | 11047 | 9147 | |
| Display | 6.8" LTPO AMOLED | 6.4" LTPO AMOLED | |
| Resolution | 1440x3168 | 2670x1200 | |
| Refresh rate | 144 Hz | 120 Hz | |
| Battery | 7400 mAh | 5240 mAh | |
| Charging | 120W | 90W | |
| Wireless charging | 50W | 50W | |
| DXOMark (camera) | — | 147 | |
| Main camera | 50 MP | 50 MP | |
| Ultrawide | 50 MP | 50 MP | |
| Telephoto | 50 MP | 50 MP | |
| Front camera | 32 MP | 32 MP | |
| RAM | 12GB / 16GB / 24GB | 12GB / 16GB | |
| Storage | 256GB / 512GB / 1TB | 256GB / 512GB / 1TB | |
| OS | Android 16 | Android 15 / HyperOS 2 | |
| Brightness (peak) | 8000 nits | 3200 nits | |
| NFC | yes | yes | |
| Protection | IP68 | IP68 | |
| Dimensions | 163.7×76.8×8.7 mm | 152.3×71.2×8.4 mm | |
| Weight | 227 g | 191 g | |
| Launch price | $799 | $635 |
Camera comparison
Vivo iQOO 15 Ultra
- Main: 50MP f/1.9
- Ultrawide: 50MP
- Telephoto: 50MP
- Front: 32MP
Xiaomi 15
- Main: 50MP f/1.6
- Ultrawide: 50MP
- Telephoto: 50MP
- Front: 32MP
Display comparison
Vivo iQOO 15 Ultra
- 6.8" LTPO AMOLED
- Resolution: 1440x3168
- Refresh rate: 144 Hz
Xiaomi 15
- 6.4" LTPO AMOLED
- Resolution: 2670x1200
- Refresh rate: 120 Hz
Battery and charging
Vivo iQOO 15 Ultra
- 7400 mAh
- Wired: 120W
- Wireless: 50W
Xiaomi 15
- 5240 mAh
- NanoReview test: web browsing 13:20 hrs, total 31:54 hrs
- Wired: 90W
- Wireless: 50W
Overall performance score
We compared Vivo iQOO 15 Ultra and Xiaomi 15, covering their specs and all relevant benchmarks.
Vivo iQOO 15 Ultra leads Xiaomi 15 by 57.9% in our overall performance rating.
Benchmarks
Launch prices and where to check today's
Launch price difference: $164. Xiaomi 15 was $164 cheaper at launch.
Detailed category analysis
performance
In the "performance" category, the Vivo iQOO 15 Ultra is a bit better (99/100 vs 91/100).
display
In the "display" category, the Vivo iQOO 15 Ultra is a bit better (99/100 vs 85/100).
camera
In the "camera" category, both devices are on the same level — 78/100.
battery
In the "battery" category, the Vivo iQOO 15 Ultra notably outperforms the Xiaomi 15 (92/100 vs 77/100).
portability
In the "portability" category, the Xiaomi 15 notably outperforms the Vivo iQOO 15 Ultra (60/100 vs 35/100).
Frequently asked questions
Which is better: the Vivo iQOO 15 Ultra or the Xiaomi 15?
The Vivo iQOO 15 Ultra edges out the Xiaomi 15 by just 7 points — the two devices are very close in overall level.
What is the rating of the Vivo iQOO 15 Ultra and the Xiaomi 15?
The Vivo iQOO 15 Ultra has a MobileRank rating of 89/100, the Xiaomi 15 — 82/100.
Which is more powerful: the Vivo iQOO 15 Ultra or the Xiaomi 15?
The Vivo iQOO 15 Ultra leads on performance (99/100 vs 91/100).
Should you choose the Vivo iQOO 15 Ultra over the Xiaomi 15?
The Vivo iQOO 15 Ultra is a better fit for gamers and power users, 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.