ASUS ROG Phone II ZS660KL vs Redmi K90
The ASUS ROG Phone II ZS660KL (2019) runs on the Qualcomm Snapdragon 855+, while the Redmi K90 (2025) runs on the Qualcomm Snapdragon 8 Elite; launch prices were $899 and $401. By overall MobileRank rating, the Redmi K90 leads — 76/100 vs 52/100 (a 24-point difference). Key differences: the Redmi K90 has the bigger battery (7100 mAh vs 6000); the main camera is 48 MP vs 50 MP; the Redmi K90 is faster in AnTuTu (3,077,585 vs 859,084); the Redmi K90 is noticeably lighter (206g vs 240g).
Profile comparison
Category scores
ASUS ROG Phone II ZS660KL
Redmi K90
What makes ASUS ROG Phone II ZS660KL better?
- Overall rating 52/100
What makes Redmi K90 better?
- Higher AnTuTu: 3077585 vs 859084
- Better Geekbench Single: 3013 vs 1031
- Better Geekbench Multi: 9287 vs 2864
- Bigger battery: 7100 vs 6000 mAh
- Faster charging: 100W vs 30W
- Better main camera: 50MP vs 48MP
- Lighter: 206g vs 240g
- Cheaper at launch: $401 vs $899
- Higher performance (91/100 vs 55/100)
- Better camera (58/100 vs 39/100)
- Longer battery life (72/100 vs 53/100)
- Better display (82/100 vs 79/100)
- Better portability (55/100 vs 20/100)
Comparison verdict
Comparing the ASUS ROG Phone II ZS660KL vs the Redmi K90, the Redmi K90 scores 24 points higher (76/100 vs 52/100). In the "performance" category, the Redmi K90 leads (91/100 vs 55/100). In the "camera" category, the Redmi K90 leads (58/100 vs 39/100). In the "battery" category, the Redmi K90 leads (72/100 vs 53/100). Value score: ASUS ROG Phone II ZS660KL — 16/100, Redmi K90 — 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 Redmi K90 significantly outperforms the ASUS ROG Phone II ZS660KL (91/100 vs 55/100). In the "display" category, the Redmi K90 and the ASUS ROG Phone II ZS660KL are nearly equal (82/100 vs 79/100). In the "camera" category, the Redmi K90 notably outperforms the ASUS ROG Phone II ZS660KL (58/100 vs 39/100). In the "battery" category, the Redmi K90 notably outperforms the ASUS ROG Phone II ZS660KL (72/100 vs 53/100). In the "portability" category, the Redmi K90 significantly outperforms the ASUS ROG Phone II ZS660KL (55/100 vs 20/100).
Specs comparison
| Specification | ASUS ROG Phone II ZS660KL | Redmi K90 | |
|---|---|---|---|
| Processor | Qualcomm Snapdragon 855+ | Qualcomm Snapdragon 8 Elite | |
| AnTuTu | 859084 | 3077585 | |
| Geekbench Single | 1031 | 3013 | |
| Geekbench Multi | 2864 | 9287 | |
| Display | 6.6" AMOLED | 6.6" AMOLED | |
| Resolution | 1080x2340 | 2510x1156 | |
| Refresh rate | 120 Hz | 120 Hz | |
| Battery | 6000 mAh | 7100 mAh | |
| Charging | 30W | 100W | |
| Main camera | 48 MP | 50 MP | |
| Ultrawide | 13 MP | 8 MP | |
| Telephoto | 0 MP | 50 MP | |
| Front camera | 24 MP | 20 MP | |
| RAM | 8GB / 12GB | 12GB / 16GB | |
| Storage | 128GB / 256GB / 512GB / 1TB | 256GB / 512GB | |
| OS | Android 9.0 / ROG UI | Android 16 | |
| Brightness (peak) | — | 3500 nits | |
| NFC | yes | yes | |
| Protection | — | IP68 | |
| Dimensions | 171.0×77.6×9.5 mm | 157.5×75.3×8.0 mm | |
| Weight | 240 g | 206 g | |
| Launch price | $899 | $401 |
Camera comparison
ASUS ROG Phone II ZS660KL
- Main: 48MP f/1.8
- Ultrawide: 13MP
- Front: 24MP
Redmi K90
- Main: 50MP f/1.9
- Ultrawide: 8MP
- Telephoto: 50MP
- Front: 20MP
Display comparison
ASUS ROG Phone II ZS660KL
- 6.6" AMOLED
- Resolution: 1080x2340
- Refresh rate: 120 Hz
Redmi K90
- 6.6" AMOLED
- Resolution: 2510x1156
- Refresh rate: 120 Hz
Battery and charging
ASUS ROG Phone II ZS660KL
- 6000 mAh
- Wired: 30W
- No wireless charging
Redmi K90
- 7100 mAh
- Wired: 100W
- No wireless charging
Overall performance score
We compared ASUS ROG Phone II ZS660KL and Redmi K90, covering their specs and all relevant benchmarks.
Redmi K90 leads ASUS ROG Phone II ZS660KL by 72.1% in our overall performance rating.
Benchmarks
Launch prices and where to check today's
Launch price difference: $498. Redmi K90 was $498 cheaper at launch.
Detailed category analysis
performance
In the "performance" category, the Redmi K90 significantly outperforms the ASUS ROG Phone II ZS660KL (91/100 vs 55/100).
display
In the "display" category, the Redmi K90 and the ASUS ROG Phone II ZS660KL are nearly equal (82/100 vs 79/100).
camera
In the "camera" category, the Redmi K90 notably outperforms the ASUS ROG Phone II ZS660KL (58/100 vs 39/100).
battery
In the "battery" category, the Redmi K90 notably outperforms the ASUS ROG Phone II ZS660KL (72/100 vs 53/100).
portability
In the "portability" category, the Redmi K90 significantly outperforms the ASUS ROG Phone II ZS660KL (55/100 vs 20/100).
Frequently asked questions
Which is better: the ASUS ROG Phone II ZS660KL or the Redmi K90?
The Redmi K90 significantly outperforms the ASUS ROG Phone II ZS660KL by 24 points (76/100 vs 52/100).
What is the rating of the ASUS ROG Phone II ZS660KL and the Redmi K90?
The ASUS ROG Phone II ZS660KL has a MobileRank rating of 52/100, the Redmi K90 — 76/100.
Which has the better camera: the ASUS ROG Phone II ZS660KL or the Redmi K90?
The Redmi K90 leads on camera score (58/100 vs 39/100).
Which is more powerful: the ASUS ROG Phone II ZS660KL or the Redmi K90?
The Redmi K90 leads on performance (91/100 vs 55/100).
Should you choose the ASUS ROG Phone II ZS660KL over the Redmi K90?
The Redmi K90 is a better fit for gamers and power users, budget-conscious buyers.