Poco C85x vs Redmi K90 Ultra
The Poco C85x (2026) runs on the Unisoc T8300, while the Redmi K90 Ultra (2026) runs on the Qualcomm Snapdragon 8 Elite. By overall MobileRank rating, the Redmi K90 Ultra leads — 73/100 vs 42/100 (a 31-point difference). Key differences: the Redmi K90 Ultra has the bigger battery (8550 mAh vs 6300); the main camera is 32 MP vs 50 MP; the Redmi K90 Ultra is faster in AnTuTu (3,119,308 vs 639,225); the Redmi K90 Ultra has NFC for contactless payments, the Poco C85x doesn't; the Poco C85x is noticeably lighter (210g vs 227g).
Poco C85x
Redmi K90 Ultra
- Lighter: 210g vs 227g
- Better portability (51/100 vs 40/100)
- Higher AnTuTu: 3119308 vs 639225
- Better Geekbench Single: 3041 vs 880
- Better Geekbench Multi: 9494 vs 2073
- Bigger battery: 8550 vs 6300 mAh
- Faster charging: 100W vs 15W
- Better main camera: 50MP vs 32MP
- Higher refresh rate: 165Hz vs 120Hz
- Higher performance (92/100 vs 47/100)
- Better camera (37/100 vs 20/100)
- Longer battery life (78/100 vs 52/100)
- Better display (94/100 vs 55/100)
Comparing the Poco C85x vs the Redmi K90 Ultra, the Redmi K90 Ultra scores 31 points higher (73/100 vs 42/100). In the "performance" category, the Redmi K90 Ultra leads (92/100 vs 47/100). In the "camera" category, the Redmi K90 Ultra leads (37/100 vs 20/100). In the "battery" category, the Redmi K90 Ultra leads (78/100 vs 52/100). In the "performance" category, the Redmi K90 Ultra significantly outperforms the Poco C85x (92/100 vs 47/100). In the "display" category, the Redmi K90 Ultra significantly outperforms the Poco C85x (94/100 vs 55/100). In the "camera" category, the Redmi K90 Ultra notably outperforms the Poco C85x (37/100 vs 20/100). In the "battery" category, the Redmi K90 Ultra notably outperforms the Poco C85x (78/100 vs 52/100). In the "portability" category, the Poco C85x is a bit better (51/100 vs 40/100).
| Specification | Poco C85x | Redmi K90 Ultra | |
|---|---|---|---|
| Processor | Unisoc T8300 | Qualcomm Snapdragon 8 Elite | |
| AnTuTu | 639225 | 3119308 | |
| Geekbench Single | 880 | 3041 | |
| Geekbench Multi | 2073 | 9494 | |
| Display | 6.9" IPS LCD | 6.8" AMOLED | |
| Resolution | 720x1600 | 1280x2772 | |
| Refresh rate | 120 Hz | 165 Hz | |
| Battery | 6300 mAh | 8550 mAh | |
| Charging | 15W | 100W | |
| Main camera | 32 MP | 50 MP | |
| Ultrawide | 0 MP | 8 MP | |
| Front camera | 8 MP | 20 MP | |
| RAM | 4GB | 12GB / 16GB | |
| Storage | 64GB / 128GB | 256GB / 512GB | |
| OS | Android 16, HyperOS 3 | Android 16 | |
| Brightness (peak) | 810 nits | 3500 nits | |
| NFC | no | yes | |
| Protection | — | IP68/IP69 | |
| Dimensions | 171.6×79.5×8.2 mm | 162.9×77.9×8.2 mm | |
| Weight | 210 g | 227 g | |
| Launch price | — | $420 |
Poco C85x
- Main: 32MP
- Front: 8MP
Redmi K90 Ultra
- Main: 50MP f/1.7
- Ultrawide: 8MP
- Front: 20MP
Poco C85x
- 6.9" IPS LCD
- Resolution: 720x1600
- Refresh rate: 120 Hz
Redmi K90 Ultra
- 6.8" AMOLED
- Resolution: 1280x2772
- Refresh rate: 165 Hz
Poco C85x
- 6300 mAh
- Wired: 15W
- No wireless charging
Redmi K90 Ultra
- 8550 mAh
- Wired: 100W
- No wireless charging
We compared Poco C85x and Redmi K90 Ultra, covering their specs and all relevant benchmarks.
Redmi K90 Ultra leads Poco C85x by 79.5% in our overall performance rating.
Poco C85x
Price unknownperformance
In the "performance" category, the Redmi K90 Ultra significantly outperforms the Poco C85x (92/100 vs 47/100).
display
In the "display" category, the Redmi K90 Ultra significantly outperforms the Poco C85x (94/100 vs 55/100).
camera
In the "camera" category, the Redmi K90 Ultra notably outperforms the Poco C85x (37/100 vs 20/100).
battery
In the "battery" category, the Redmi K90 Ultra notably outperforms the Poco C85x (78/100 vs 52/100).
portability
In the "portability" category, the Poco C85x is a bit better (51/100 vs 40/100).
Which is better: the Poco C85x or the Redmi K90 Ultra?
The Redmi K90 Ultra significantly outperforms the Poco C85x by 31 points (73/100 vs 42/100).
What is the rating of the Poco C85x and the Redmi K90 Ultra?
The Poco C85x has a MobileRank rating of 42/100, the Redmi K90 Ultra — 73/100.
Which has the better camera: the Poco C85x or the Redmi K90 Ultra?
The Redmi K90 Ultra leads on camera score (37/100 vs 20/100).
Which is more powerful: the Poco C85x or the Redmi K90 Ultra?
The Redmi K90 Ultra leads on performance (92/100 vs 47/100).
Should you choose the Poco C85x over the Redmi K90 Ultra?
The Poco C85x is a better fit for everyday use. The Redmi K90 Ultra is a better fit for gamers and power users, those who care about battery life, budget-conscious buyers.