Redmi K90 Ultra vs Sharp Aquos R9
The Redmi K90 Ultra (2026) runs on the Qualcomm Snapdragon 8 Elite, while the Sharp Aquos R9 (2024) runs on the Qualcomm Snapdragon 7+ Gen 3; launch prices were $420 and $599. By overall MobileRank rating, the Redmi K90 Ultra leads — 73/100 vs 68/100 (a 5-point difference). Key differences: the Redmi K90 Ultra has the bigger battery (8550 mAh vs 5000); the Redmi K90 Ultra is faster in AnTuTu (3,233,695 vs 1,660,924); the Sharp Aquos R9 is noticeably lighter (195g vs 227g).
Profile comparison
Category scores
Redmi K90 Ultra
Sharp Aquos R9
What makes Redmi K90 Ultra better?
- Higher AnTuTu: 3233695 vs 1660924
- Better Geekbench Single: 3013 vs 1860
- Better Geekbench Multi: 9287 vs 5045
- Bigger battery: 8550 vs 5000 mAh
- Cheaper at launch: $420 vs $599
- Higher performance (92/100 vs 74/100)
- Longer battery life (78/100 vs 52/100)
- Better display (94/100 vs 90/100)
What makes Sharp Aquos R9 better?
- Higher refresh rate: 240Hz vs 165Hz
- Lighter: 195g vs 227g
- Better camera (60/100 vs 37/100)
- Better portability (52/100 vs 40/100)
Comparison verdict
Comparing the Redmi K90 Ultra vs the Sharp Aquos R9, the Redmi K90 Ultra scores 5 points higher (73/100 vs 68/100). In the "performance" category, the Redmi K90 Ultra leads (92/100 vs 74/100). In the "camera" category, the Sharp Aquos R9 leads (60/100 vs 37/100). In the "battery" category, the Redmi K90 Ultra leads (78/100 vs 52/100). Value score: Redmi K90 Ultra — 72/100, Sharp Aquos R9 — 50/100; 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 Ultra notably outperforms the Sharp Aquos R9 (92/100 vs 74/100). In the "display" category, the Redmi K90 Ultra and the Sharp Aquos R9 are nearly equal (94/100 vs 90/100). In the "camera" category, the Sharp Aquos R9 notably outperforms the Redmi K90 Ultra (60/100 vs 37/100). In the "battery" category, the Redmi K90 Ultra notably outperforms the Sharp Aquos R9 (78/100 vs 52/100). In the "portability" category, the Sharp Aquos R9 is a bit better (52/100 vs 40/100).
Specs comparison
| Specification | Redmi K90 Ultra | Sharp Aquos R9 | |
|---|---|---|---|
| Processor | Qualcomm Snapdragon 8 Elite | Qualcomm Snapdragon 7+ Gen 3 | |
| AnTuTu | 3233695 | 1660924 | |
| Geekbench Single | 3013 | 1860 | |
| Geekbench Multi | 9287 | 5045 | |
| Display | 6.8" AMOLED | 6.5" PRO IGZO LTPO OLED | |
| Resolution | 1280x2772 | 1080x2340 | |
| Refresh rate | 165 Hz | 240 Hz | |
| Battery | 8550 mAh | 5000 mAh | |
| Charging | 100W | — | |
| Main camera | 50 MP | 50 MP | |
| Ultrawide | 8 MP | 50 MP | |
| Front camera | 20 MP | 50 MP | |
| RAM | 12GB / 16GB | 12GB | |
| Storage | 256GB / 512GB | 256GB | |
| OS | Android 16 | Android 14 | |
| Brightness (peak) | 3500 nits | 2000 nits | |
| NFC | yes | yes | |
| Protection | IP68/IP69 | IP68 | |
| Dimensions | 162.9×77.9×8.2 mm | 156.0×75.0×8.9 mm | |
| Weight | 227 g | 195 g | |
| Launch price | $420 | $599 |
Camera comparison
Redmi K90 Ultra
- Main: 50MP f/1.7
- Ultrawide: 8MP
- Front: 20MP
Sharp Aquos R9
- Main: 50MP f/1.9
- Ultrawide: 50MP
- Front: 50MP
Display comparison
Redmi K90 Ultra
- 6.8" AMOLED
- Resolution: 1280x2772
- Refresh rate: 165 Hz
Sharp Aquos R9
- 6.5" PRO IGZO LTPO OLED
- Resolution: 1080x2340
- Refresh rate: 240 Hz
Battery and charging
Redmi K90 Ultra
- 8550 mAh
- Wired: 100W
- No wireless charging
Sharp Aquos R9
- 5000 mAh
- No wireless charging
Overall performance score
We compared Redmi K90 Ultra and Sharp Aquos R9, covering their specs and all relevant benchmarks.
Redmi K90 Ultra leads Sharp Aquos R9 by 94.7% in our overall performance rating.
Benchmarks
Launch prices and where to check today's
Launch price difference: $179. Redmi K90 Ultra was $179 cheaper at launch.
Detailed category analysis
performance
In the "performance" category, the Redmi K90 Ultra notably outperforms the Sharp Aquos R9 (92/100 vs 74/100).
display
In the "display" category, the Redmi K90 Ultra and the Sharp Aquos R9 are nearly equal (94/100 vs 90/100).
camera
In the "camera" category, the Sharp Aquos R9 notably outperforms the Redmi K90 Ultra (60/100 vs 37/100).
battery
In the "battery" category, the Redmi K90 Ultra notably outperforms the Sharp Aquos R9 (78/100 vs 52/100).
portability
In the "portability" category, the Sharp Aquos R9 is a bit better (52/100 vs 40/100).
Frequently asked questions
Which is better: the Redmi K90 Ultra or the Sharp Aquos R9?
The Redmi K90 Ultra edges out the Sharp Aquos R9 by just 5 points — the two devices are very close in overall level.
What is the rating of the Redmi K90 Ultra and the Sharp Aquos R9?
The Redmi K90 Ultra has a MobileRank rating of 73/100, the Sharp Aquos R9 — 68/100.
Which has the better camera: the Redmi K90 Ultra or the Sharp Aquos R9?
The Sharp Aquos R9 leads on camera score (60/100 vs 37/100).
Which is more powerful: the Redmi K90 Ultra or the Sharp Aquos R9?
The Redmi K90 Ultra leads on performance (92/100 vs 74/100).
Should you choose the Redmi K90 Ultra over the Sharp Aquos R9?
The Redmi K90 Ultra is a better fit for gamers and power users, those who care about battery life. The Sharp Aquos R9 is a better fit for active users.