ASUS ROG Phone II ZS660KL vs Xiaomi 17 Ultra (China)
The ASUS ROG Phone II ZS660KL (2019) runs on the Qualcomm Snapdragon 855+, while the Xiaomi 17 Ultra (China) (2025) runs on the Snapdragon 8 Elite Gen 5; launch prices were $899 and $892. By overall MobileRank rating, the Xiaomi 17 Ultra (China) leads — 87/100 vs 52/100 (a 35-point difference). Key differences: the Xiaomi 17 Ultra (China) has the bigger battery (6800 mAh vs 6000); the main camera is 48 MP vs 50 MP; the Xiaomi 17 Ultra (China) is faster in AnTuTu (3,950,082 vs 859,084); the Xiaomi 17 Ultra (China) is noticeably lighter (224g vs 240g).
Profile comparison
Category scores
ASUS ROG Phone II ZS660KL
Xiaomi 17 Ultra (China)
What makes ASUS ROG Phone II ZS660KL better?
- Overall rating 52/100
What makes Xiaomi 17 Ultra (China) better?
- Higher AnTuTu: 3950082 vs 859084
- Better Geekbench Single: 3639 vs 1031
- Better Geekbench Multi: 11047 vs 2864
- Bigger battery: 6800 vs 6000 mAh
- Faster charging: 90W vs 30W
- Better main camera: 50MP vs 48MP
- Lighter: 224g vs 240g
- Cheaper at launch: $892 vs $899
- Higher performance (98/100 vs 55/100)
- Better camera (87/100 vs 39/100)
- Longer battery life (83/100 vs 53/100)
- Better display (81/100 vs 79/100)
- Better portability (42/100 vs 20/100)
Comparison verdict
Comparing the ASUS ROG Phone II ZS660KL vs the Xiaomi 17 Ultra (China), the Xiaomi 17 Ultra (China) scores 35 points higher (87/100 vs 52/100). In the "performance" category, the Xiaomi 17 Ultra (China) leads (98/100 vs 55/100). In the "camera" category, the Xiaomi 17 Ultra (China) leads (87/100 vs 39/100). In the "battery" category, the Xiaomi 17 Ultra (China) leads (83/100 vs 53/100). Value score: ASUS ROG Phone II ZS660KL — 16/100, Xiaomi 17 Ultra (China) — 88/100; 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 17 Ultra (China) significantly outperforms the ASUS ROG Phone II ZS660KL (98/100 vs 55/100). In the "display" category, the Xiaomi 17 Ultra (China) and the ASUS ROG Phone II ZS660KL are nearly equal (81/100 vs 79/100). In the "camera" category, the Xiaomi 17 Ultra (China) significantly outperforms the ASUS ROG Phone II ZS660KL (87/100 vs 39/100). In the "battery" category, the Xiaomi 17 Ultra (China) significantly outperforms the ASUS ROG Phone II ZS660KL (83/100 vs 53/100). In the "portability" category, the Xiaomi 17 Ultra (China) notably outperforms the ASUS ROG Phone II ZS660KL (42/100 vs 20/100).
Specs comparison
| Specification | ASUS ROG Phone II ZS660KL | Xiaomi 17 Ultra (China) | |
|---|---|---|---|
| Processor | Qualcomm Snapdragon 855+ | Snapdragon 8 Elite Gen 5 | |
| AnTuTu | 859084 | 3950082 | |
| Geekbench Single | 1031 | 3639 | |
| Geekbench Multi | 2864 | 11047 | |
| Display | 6.6" AMOLED | 6.9" LTPO AMOLED | |
| Resolution | 1080x2340 | 1200x2608 | |
| Refresh rate | 120 Hz | 120 Hz | |
| Battery | 6000 mAh | 6800 mAh | |
| Charging | 30W | 90W | |
| Wireless charging | 0W | 50W | |
| Main camera | 48 MP | 50 MP | |
| Ultrawide | 13 MP | 50 MP | |
| Telephoto | 0 MP | 200 MP | |
| Front camera | 24 MP | 50 MP | |
| RAM | 8GB / 12GB | 12GB / 16GB | |
| Storage | 128GB / 256GB / 512GB / 1TB | 512GB / 1TB | |
| OS | Android 9.0 / ROG UI | Android 16 | |
| NFC | yes | yes | |
| Protection | — | IP68/IP69 | |
| Dimensions | 171.0×77.6×9.5 mm | 162.9×77.6×8.3 mm | |
| Weight | 240 g | 224 g | |
| Launch price | $899 | $892 |
Camera comparison
ASUS ROG Phone II ZS660KL
- Main: 48MP f/1.8
- Ultrawide: 13MP
- Front: 24MP
Xiaomi 17 Ultra (China)
- Main: 50MP f/1.7
- Ultrawide: 50MP
- Telephoto: 200MP
- Front: 50MP
Display comparison
ASUS ROG Phone II ZS660KL
- 6.6" AMOLED
- Resolution: 1080x2340
- Refresh rate: 120 Hz
Xiaomi 17 Ultra (China)
- 6.9" LTPO AMOLED
- Resolution: 1200x2608
- Refresh rate: 120 Hz
Battery and charging
ASUS ROG Phone II ZS660KL
- 6000 mAh
- Wired: 30W
- No wireless charging
Xiaomi 17 Ultra (China)
- 6800 mAh
- Wired: 90W
- Wireless: 50W
Overall performance score
We compared ASUS ROG Phone II ZS660KL and Xiaomi 17 Ultra (China), covering their specs and all relevant benchmarks.
Xiaomi 17 Ultra (China) leads ASUS ROG Phone II ZS660KL by 78.3% in our overall performance rating.
Benchmarks
Launch prices and where to check today's
Launch price difference: $7. Xiaomi 17 Ultra (China) was $7 cheaper at launch.
Detailed category analysis
performance
In the "performance" category, the Xiaomi 17 Ultra (China) significantly outperforms the ASUS ROG Phone II ZS660KL (98/100 vs 55/100).
display
In the "display" category, the Xiaomi 17 Ultra (China) and the ASUS ROG Phone II ZS660KL are nearly equal (81/100 vs 79/100).
camera
In the "camera" category, the Xiaomi 17 Ultra (China) significantly outperforms the ASUS ROG Phone II ZS660KL (87/100 vs 39/100).
battery
In the "battery" category, the Xiaomi 17 Ultra (China) significantly outperforms the ASUS ROG Phone II ZS660KL (83/100 vs 53/100).
portability
In the "portability" category, the Xiaomi 17 Ultra (China) notably outperforms the ASUS ROG Phone II ZS660KL (42/100 vs 20/100).
Frequently asked questions
Which is better: the ASUS ROG Phone II ZS660KL or the Xiaomi 17 Ultra (China)?
The Xiaomi 17 Ultra (China) significantly outperforms the ASUS ROG Phone II ZS660KL by 35 points (87/100 vs 52/100).
What is the rating of the ASUS ROG Phone II ZS660KL and the Xiaomi 17 Ultra (China)?
The ASUS ROG Phone II ZS660KL has a MobileRank rating of 52/100, the Xiaomi 17 Ultra (China) — 87/100.
Which has the better camera: the ASUS ROG Phone II ZS660KL or the Xiaomi 17 Ultra (China)?
The Xiaomi 17 Ultra (China) leads on camera score (87/100 vs 39/100).
Which is more powerful: the ASUS ROG Phone II ZS660KL or the Xiaomi 17 Ultra (China)?
The Xiaomi 17 Ultra (China) leads on performance (98/100 vs 55/100).
Should you choose the ASUS ROG Phone II ZS660KL over the Xiaomi 17 Ultra (China)?
The Xiaomi 17 Ultra (China) is a better fit for gamers and power users, mobile photography enthusiasts, those who care about battery life, budget-conscious buyers.