OnePlus Ace 6 Ultra vs Xiaomi 15 Ultra
The OnePlus Ace 6 Ultra (2026) runs on the MediaTek Dimensity 9500, while the Xiaomi 15 Ultra (2025) runs on the Qualcomm Snapdragon 8 Elite; launch prices were $555 and $999. By overall MobileRank rating, the Xiaomi 15 Ultra leads — 85/100 vs 74/100 (a 11-point difference). Key differences: the OnePlus Ace 6 Ultra has the bigger battery (8600 mAh vs 6000); the OnePlus Ace 6 Ultra is faster in AnTuTu (3,429,868 vs 3,030,376).
Profile comparison
Category scores
OnePlus Ace 6 Ultra
Xiaomi 15 Ultra
What makes OnePlus Ace 6 Ultra better?
- Higher AnTuTu: 3429868 vs 3030376
- Better Geekbench Single: 3293 vs 3050
- Better Geekbench Multi: 10243 vs 10200
- Bigger battery: 8600 vs 6000 mAh
- Faster charging: 120W vs 90W
- Higher refresh rate: 165Hz vs 120Hz
- Lighter: 217g vs 225g
- Cheaper at launch: $555 vs $999
- Higher performance (94/100 vs 92/100)
- Longer battery life (82/100 vs 80/100)
- Better display (94/100 vs 90/100)
- Better portability (43/100 vs 29/100)
What makes Xiaomi 15 Ultra better?
- Better camera (87/100 vs 35/100)
Comparison verdict
Comparing the OnePlus Ace 6 Ultra vs the Xiaomi 15 Ultra, the Xiaomi 15 Ultra scores 11 points higher (85/100 vs 74/100). In the "camera" category, the Xiaomi 15 Ultra leads (87/100 vs 35/100). Value score: OnePlus Ace 6 Ultra — 66/100, 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 OnePlus Ace 6 Ultra and the Xiaomi 15 Ultra are nearly equal (94/100 vs 92/100). In the "display" category, the OnePlus Ace 6 Ultra and the Xiaomi 15 Ultra are nearly equal (94/100 vs 90/100). In the "camera" category, the Xiaomi 15 Ultra significantly outperforms the OnePlus Ace 6 Ultra (87/100 vs 35/100). In the "battery" category, the OnePlus Ace 6 Ultra and the Xiaomi 15 Ultra are nearly equal (82/100 vs 80/100). In the "portability" category, the OnePlus Ace 6 Ultra is a bit better (43/100 vs 29/100).
Specs comparison
| Specification | OnePlus Ace 6 Ultra | Xiaomi 15 Ultra | |
|---|---|---|---|
| Processor | MediaTek Dimensity 9500 | Qualcomm Snapdragon 8 Elite | |
| AnTuTu | 3429868 | 3030376 | |
| Geekbench Single | 3293 | 3050 | |
| Geekbench Multi | 10243 | 10200 | |
| Display | 6.8" AMOLED | 6.7" LTPO AMOLED | |
| Resolution | 1272x2772 | 3200x1440 | |
| Refresh rate | 165 Hz | 120 Hz | |
| Battery | 8600 mAh | 6000 mAh | |
| Charging | 120W | 90W | |
| Wireless charging | 0W | 50W | |
| DXOMark (camera) | — | 159 | |
| Main camera | 50 MP | 50 MP | |
| Ultrawide | 8 MP | 50 MP | |
| Telephoto | 0 MP | 50 MP | |
| Front camera | 16 MP | 32 MP | |
| RAM | 12GB / 16GB | 16GB | |
| Storage | 256GB / 512GB / 1TB | 256GB / 512GB / 1TB | |
| OS | Android 16 | Android 15 / HyperOS 2 | |
| Brightness (peak) | 1800 nits | 3200 nits | |
| NFC | yes | yes | |
| Protection | IP66 | IP68 | |
| Dimensions | 162.5×77.5×8.5 mm | 161.3×75.3×9.4 mm | |
| Weight | 217 g | 225 g | |
| Launch price | $555 | $999 |
Camera comparison
OnePlus Ace 6 Ultra
- Main: 50MP f/1.8
- Ultrawide: 8MP
- Front: 16MP
Xiaomi 15 Ultra
- Main: 50MP f/1.63
- Ultrawide: 50MP
- Telephoto: 50MP
- Front: 32MP
Display comparison
OnePlus Ace 6 Ultra
- 6.8" AMOLED
- Resolution: 1272x2772
- Refresh rate: 165 Hz
Xiaomi 15 Ultra
- 6.7" LTPO AMOLED
- Resolution: 3200x1440
- Refresh rate: 120 Hz
Battery and charging
OnePlus Ace 6 Ultra
- 8600 mAh
- Wired: 120W
- No wireless charging
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 OnePlus Ace 6 Ultra and Xiaomi 15 Ultra, covering their specs and all relevant benchmarks.
OnePlus Ace 6 Ultra leads Xiaomi 15 Ultra by 13.2% in our overall performance rating.
Benchmarks
Launch prices and where to check today's
Launch price difference: $444. OnePlus Ace 6 Ultra was $444 cheaper at launch.
Detailed category analysis
performance
In the "performance" category, the OnePlus Ace 6 Ultra and the Xiaomi 15 Ultra are nearly equal (94/100 vs 92/100).
display
In the "display" category, the OnePlus Ace 6 Ultra and the Xiaomi 15 Ultra are nearly equal (94/100 vs 90/100).
camera
In the "camera" category, the Xiaomi 15 Ultra significantly outperforms the OnePlus Ace 6 Ultra (87/100 vs 35/100).
battery
In the "battery" category, the OnePlus Ace 6 Ultra and the Xiaomi 15 Ultra are nearly equal (82/100 vs 80/100).
portability
In the "portability" category, the OnePlus Ace 6 Ultra is a bit better (43/100 vs 29/100).
Frequently asked questions
Which is better: the OnePlus Ace 6 Ultra or the Xiaomi 15 Ultra?
The Xiaomi 15 Ultra is noticeably better than the OnePlus Ace 6 Ultra — the overall rating gap is 11 points.
What is the rating of the OnePlus Ace 6 Ultra and the Xiaomi 15 Ultra?
The OnePlus Ace 6 Ultra has a MobileRank rating of 74/100, the Xiaomi 15 Ultra — 85/100.
Which has the better camera: the OnePlus Ace 6 Ultra or the Xiaomi 15 Ultra?
The Xiaomi 15 Ultra leads on camera score (87/100 vs 35/100).
Should you choose the OnePlus Ace 6 Ultra over the Xiaomi 15 Ultra?
The OnePlus Ace 6 Ultra is a better fit for gamers and power users, those who care about battery life. 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.