OnePlus Ace 6T vs Xiaomi 15 Ultra
The OnePlus Ace 6T (2025) runs on the Qualcomm Snapdragon 8 Gen 5, while the Xiaomi 15 Ultra (2025) runs on the Qualcomm Snapdragon 8 Elite; launch prices were $320 and $999. By overall MobileRank rating, the Xiaomi 15 Ultra leads — 85/100 vs 72/100 (a 13-point difference). Key differences: the OnePlus Ace 6T has the bigger battery (8300 mAh vs 6000); the Xiaomi 15 Ultra is faster in AnTuTu (3,030,376 vs 2,788,201); the OnePlus Ace 6T is thinner (8.1mm vs 9.4mm).
Profile comparison
Category scores
OnePlus Ace 6T
Xiaomi 15 Ultra
What makes OnePlus Ace 6T better?
- Bigger battery: 8300 vs 6000 mAh
- Faster charging: 100W vs 90W
- Higher refresh rate: 165Hz vs 120Hz
- Lighter: 211g vs 225g
- Cheaper at launch: $320 vs $999
- Better display (94/100 vs 90/100)
- Better portability (51/100 vs 29/100)
What makes Xiaomi 15 Ultra better?
- Higher AnTuTu: 3030376 vs 2788201
- Better Geekbench Single: 3050 vs 2833
- Better Geekbench Multi: 10200 vs 9119
- Higher performance (92/100 vs 89/100)
- Better camera (87/100 vs 35/100)
- Longer battery life (80/100 vs 77/100)
Comparison verdict
Comparing the OnePlus Ace 6T vs the Xiaomi 15 Ultra, the Xiaomi 15 Ultra scores 13 points higher (85/100 vs 72/100). In the "camera" category, the Xiaomi 15 Ultra leads (87/100 vs 35/100). Value score: OnePlus Ace 6T — 80/100, 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 Xiaomi 15 Ultra and the OnePlus Ace 6T are nearly equal (92/100 vs 89/100). In the "display" category, the OnePlus Ace 6T 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 6T (87/100 vs 35/100). In the "battery" category, the Xiaomi 15 Ultra and the OnePlus Ace 6T are nearly equal (80/100 vs 77/100). In the "portability" category, the OnePlus Ace 6T notably outperforms the Xiaomi 15 Ultra (51/100 vs 29/100).
Specs comparison
| Specification | OnePlus Ace 6T | Xiaomi 15 Ultra | |
|---|---|---|---|
| Processor | Qualcomm Snapdragon 8 Gen 5 | Qualcomm Snapdragon 8 Elite | |
| AnTuTu | 2788201 | 3030376 | |
| Geekbench Single | 2833 | 3050 | |
| Geekbench Multi | 9119 | 10200 | |
| Display | 6.8" AMOLED | 6.7" LTPO AMOLED | |
| Resolution | 1272x2800 | 3200x1440 | |
| Refresh rate | 165 Hz | 120 Hz | |
| Battery | 8300 mAh | 6000 mAh | |
| Charging | 100W | 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) | 3600 nits | 3200 nits | |
| NFC | yes | yes | |
| Protection | IP68 | IP68 | |
| Dimensions | 163.4×77.0×8.1 mm | 161.3×75.3×9.4 mm | |
| Weight | 211 g | 225 g | |
| Launch price | $320 | $999 |
Camera comparison
OnePlus Ace 6T
- 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 6T
- 6.8" AMOLED
- Resolution: 1272x2800
- Refresh rate: 165 Hz
Xiaomi 15 Ultra
- 6.7" LTPO AMOLED
- Resolution: 3200x1440
- Refresh rate: 120 Hz
Battery and charging
OnePlus Ace 6T
- 8300 mAh
- Wired: 100W
- 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 6T and Xiaomi 15 Ultra, covering their specs and all relevant benchmarks.
Xiaomi 15 Ultra leads OnePlus Ace 6T by 8.0% in our overall performance rating.
Benchmarks
Launch prices and where to check today's
Launch price difference: $679. OnePlus Ace 6T was $679 cheaper at launch.
Detailed category analysis
performance
In the "performance" category, the Xiaomi 15 Ultra and the OnePlus Ace 6T are nearly equal (92/100 vs 89/100).
display
In the "display" category, the OnePlus Ace 6T 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 6T (87/100 vs 35/100).
battery
In the "battery" category, the Xiaomi 15 Ultra and the OnePlus Ace 6T are nearly equal (80/100 vs 77/100).
portability
In the "portability" category, the OnePlus Ace 6T notably outperforms the Xiaomi 15 Ultra (51/100 vs 29/100).
Frequently asked questions
Which is better: the OnePlus Ace 6T or the Xiaomi 15 Ultra?
The Xiaomi 15 Ultra is noticeably better than the OnePlus Ace 6T — the overall rating gap is 13 points.
What is the rating of the OnePlus Ace 6T and the Xiaomi 15 Ultra?
The OnePlus Ace 6T has a MobileRank rating of 72/100, the Xiaomi 15 Ultra — 85/100.
Which has the better camera: the OnePlus Ace 6T or the Xiaomi 15 Ultra?
The Xiaomi 15 Ultra leads on camera score (87/100 vs 35/100).
Should you choose the OnePlus Ace 6T over the Xiaomi 15 Ultra?
The OnePlus Ace 6T is a better fit for gamers and power users, 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.