ASUS ROG Phone II ZS660KL vs OnePlus Ace 6 Ultra
The ASUS ROG Phone II ZS660KL (2019) runs on the Qualcomm Snapdragon 855+, while the OnePlus Ace 6 Ultra (2026) runs on the MediaTek Dimensity 9500; launch prices were $899 and $555. By overall MobileRank rating, the OnePlus Ace 6 Ultra leads — 74/100 vs 52/100 (a 22-point difference). Key differences: the OnePlus Ace 6 Ultra has the bigger battery (8600 mAh vs 6000); the main camera is 48 MP vs 50 MP; the OnePlus Ace 6 Ultra is faster in AnTuTu (3,429,868 vs 859,084); the OnePlus Ace 6 Ultra is noticeably lighter (217g vs 240g).
Profile comparison
Category scores
ASUS ROG Phone II ZS660KL
OnePlus Ace 6 Ultra
What makes ASUS ROG Phone II ZS660KL better?
- Better camera (39/100 vs 35/100)
What makes OnePlus Ace 6 Ultra better?
- Higher AnTuTu: 3429868 vs 859084
- Better Geekbench Single: 3293 vs 1031
- Better Geekbench Multi: 10243 vs 2864
- Bigger battery: 8600 vs 6000 mAh
- Faster charging: 120W vs 30W
- Better main camera: 50MP vs 48MP
- Higher refresh rate: 165Hz vs 120Hz
- Lighter: 217g vs 240g
- Cheaper at launch: $555 vs $899
- Higher performance (94/100 vs 55/100)
- Longer battery life (82/100 vs 53/100)
- Better display (94/100 vs 79/100)
- Better portability (43/100 vs 20/100)
Comparison verdict
Comparing the ASUS ROG Phone II ZS660KL vs the OnePlus Ace 6 Ultra, the OnePlus Ace 6 Ultra scores 22 points higher (74/100 vs 52/100). In the "performance" category, the OnePlus Ace 6 Ultra leads (94/100 vs 55/100). In the "battery" category, the OnePlus Ace 6 Ultra leads (82/100 vs 53/100). Value score: ASUS ROG Phone II ZS660KL — 16/100, OnePlus Ace 6 Ultra — 66/100; 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 significantly outperforms the ASUS ROG Phone II ZS660KL (94/100 vs 55/100). In the "display" category, the OnePlus Ace 6 Ultra notably outperforms the ASUS ROG Phone II ZS660KL (94/100 vs 79/100). In the "camera" category, the ASUS ROG Phone II ZS660KL and the OnePlus Ace 6 Ultra are nearly equal (39/100 vs 35/100). In the "battery" category, the OnePlus Ace 6 Ultra notably outperforms the ASUS ROG Phone II ZS660KL (82/100 vs 53/100). In the "portability" category, the OnePlus Ace 6 Ultra notably outperforms the ASUS ROG Phone II ZS660KL (43/100 vs 20/100).
Specs comparison
| Specification | ASUS ROG Phone II ZS660KL | OnePlus Ace 6 Ultra | |
|---|---|---|---|
| Processor | Qualcomm Snapdragon 855+ | MediaTek Dimensity 9500 | |
| AnTuTu | 859084 | 3429868 | |
| Geekbench Single | 1031 | 3293 | |
| Geekbench Multi | 2864 | 10243 | |
| Display | 6.6" AMOLED | 6.8" AMOLED | |
| Resolution | 1080x2340 | 1272x2772 | |
| Refresh rate | 120 Hz | 165 Hz | |
| Battery | 6000 mAh | 8600 mAh | |
| Charging | 30W | 120W | |
| Main camera | 48 MP | 50 MP | |
| Ultrawide | 13 MP | 8 MP | |
| Front camera | 24 MP | 16 MP | |
| RAM | 8GB / 12GB | 12GB / 16GB | |
| Storage | 128GB / 256GB / 512GB / 1TB | 256GB / 512GB / 1TB | |
| OS | Android 9.0 / ROG UI | Android 16 | |
| Brightness (peak) | — | 1800 nits | |
| NFC | yes | yes | |
| Protection | — | IP66 | |
| Dimensions | 171.0×77.6×9.5 mm | 162.5×77.5×8.5 mm | |
| Weight | 240 g | 217 g | |
| Launch price | $899 | $555 |
Camera comparison
ASUS ROG Phone II ZS660KL
- Main: 48MP f/1.8
- Ultrawide: 13MP
- Front: 24MP
OnePlus Ace 6 Ultra
- Main: 50MP f/1.8
- Ultrawide: 8MP
- Front: 16MP
Display comparison
ASUS ROG Phone II ZS660KL
- 6.6" AMOLED
- Resolution: 1080x2340
- Refresh rate: 120 Hz
OnePlus Ace 6 Ultra
- 6.8" AMOLED
- Resolution: 1272x2772
- Refresh rate: 165 Hz
Battery and charging
ASUS ROG Phone II ZS660KL
- 6000 mAh
- Wired: 30W
- No wireless charging
OnePlus Ace 6 Ultra
- 8600 mAh
- Wired: 120W
- No wireless charging
Overall performance score
We compared ASUS ROG Phone II ZS660KL and OnePlus Ace 6 Ultra, covering their specs and all relevant benchmarks.
OnePlus Ace 6 Ultra leads ASUS ROG Phone II ZS660KL by 75.0% in our overall performance rating.
Benchmarks
Launch prices and where to check today's
Launch price difference: $344. OnePlus Ace 6 Ultra was $344 cheaper at launch.
Detailed category analysis
performance
In the "performance" category, the OnePlus Ace 6 Ultra significantly outperforms the ASUS ROG Phone II ZS660KL (94/100 vs 55/100).
display
In the "display" category, the OnePlus Ace 6 Ultra notably outperforms the ASUS ROG Phone II ZS660KL (94/100 vs 79/100).
camera
In the "camera" category, the ASUS ROG Phone II ZS660KL and the OnePlus Ace 6 Ultra are nearly equal (39/100 vs 35/100).
battery
In the "battery" category, the OnePlus Ace 6 Ultra notably outperforms the ASUS ROG Phone II ZS660KL (82/100 vs 53/100).
portability
In the "portability" category, the OnePlus Ace 6 Ultra notably outperforms the ASUS ROG Phone II ZS660KL (43/100 vs 20/100).
Frequently asked questions
Which is better: the ASUS ROG Phone II ZS660KL or the OnePlus Ace 6 Ultra?
The OnePlus Ace 6 Ultra significantly outperforms the ASUS ROG Phone II ZS660KL by 22 points (74/100 vs 52/100).
What is the rating of the ASUS ROG Phone II ZS660KL and the OnePlus Ace 6 Ultra?
The ASUS ROG Phone II ZS660KL has a MobileRank rating of 52/100, the OnePlus Ace 6 Ultra — 74/100.
Which is more powerful: the ASUS ROG Phone II ZS660KL or the OnePlus Ace 6 Ultra?
The OnePlus Ace 6 Ultra leads on performance (94/100 vs 55/100).
Should you choose the ASUS ROG Phone II ZS660KL over the OnePlus Ace 6 Ultra?
The OnePlus Ace 6 Ultra is a better fit for gamers and power users, those who care about battery life.