Poco C85x vs Redmi K90 Ultra
The Poco C85x (2026) runs on the MediaTek Dimensity 6300, 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 40/100 (a 33-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 (3,233,695 vs 528,398); the Redmi K90 Ultra has NFC for contactless payments, the Poco C85x doesn't; the Poco C85x is noticeably lighter (210g vs 227g).
Profile comparison
Category scores
Poco C85x
Redmi K90 Ultra
What makes Poco C85x better?
- Lighter: 210g vs 227g
- Better portability (51/100 vs 40/100)
What makes Redmi K90 Ultra better?
- Higher AnTuTu: 3233695 vs 528398
- Better Geekbench Single: 3013 vs 771
- Better Geekbench Multi: 9287 vs 1980
- 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 43/100)
- Better camera (37/100 vs 20/100)
- Longer battery life (78/100 vs 52/100)
- Better display (94/100 vs 55/100)
Comparison verdict
Comparing the Poco C85x vs the Redmi K90 Ultra, the Redmi K90 Ultra scores 33 points higher (73/100 vs 40/100). In the "performance" category, the Redmi K90 Ultra leads (92/100 vs 43/100). 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 43/100). 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).
Specs comparison
| Specification | Poco C85x | Redmi K90 Ultra | |
|---|---|---|---|
| Processor | MediaTek Dimensity 6300 | Qualcomm Snapdragon 8 Elite | |
| AnTuTu | 528398 | 3233695 | |
| Geekbench Single | 771 | 3013 | |
| Geekbench Multi | 1980 | 9287 | |
| 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 | 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 |
Camera comparison
Poco C85x
- Main: 32MP
- Front: 8MP
Redmi K90 Ultra
- Main: 50MP f/1.7
- Ultrawide: 8MP
- Front: 20MP
Display comparison
Poco C85x
- 6.9" IPS LCD
- Resolution: 720x1600
- Refresh rate: 120 Hz
Redmi K90 Ultra
- 6.8" AMOLED
- Resolution: 1280x2772
- Refresh rate: 165 Hz
Battery and charging
Poco C85x
- 6300 mAh
- Wired: 15W
- No wireless charging
Redmi K90 Ultra
- 8550 mAh
- Wired: 100W
- No wireless charging
Overall performance score
We compared Poco C85x and Redmi K90 Ultra, covering their specs and all relevant benchmarks.
Redmi K90 Ultra leads Poco C85x by 83.7% in our overall performance rating.
Benchmarks
Launch prices and where to check today's
Poco C85x
Price unknownDetailed category analysis
performance
In the "performance" category, the Redmi K90 Ultra significantly outperforms the Poco C85x (92/100 vs 43/100).
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).
Frequently asked questions
Which is better: the Poco C85x or the Redmi K90 Ultra?
The Redmi K90 Ultra significantly outperforms the Poco C85x by 33 points (73/100 vs 40/100).
What is the rating of the Poco C85x and the Redmi K90 Ultra?
The Poco C85x has a MobileRank rating of 40/100, 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 43/100).
Should you choose the Poco C85x over the Redmi K90 Ultra?
The Redmi K90 Ultra is a better fit for gamers and power users, those who care about battery life.