Nubia Air vs Redmi K90 Ultra
The Nubia Air (2025) runs on the Unisoc T8300, while the Redmi K90 Ultra (2026) runs on the Qualcomm Snapdragon 8 Elite; launch prices were $199 and $420. By overall MobileRank rating, the Redmi K90 Ultra leads — 73/100 vs 51/100 (a 22-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 639,225); the Nubia Air is noticeably lighter (172g vs 227g).
Profile comparison
Category scores
Nubia Air
Redmi K90 Ultra
What makes Nubia Air better?
- Lighter: 172g vs 227g
- Cheaper at launch: $199 vs $420
- Better portability (90/100 vs 40/100)
What makes Redmi K90 Ultra better?
- Higher AnTuTu: 3233695 vs 639225
- Better Geekbench Single: 3013 vs 880
- Better Geekbench Multi: 9287 vs 2073
- Bigger battery: 8550 vs 5000 mAh
- Faster charging: 100W vs 33W
- Higher refresh rate: 165Hz vs 120Hz
- Higher performance (92/100 vs 47/100)
- Better camera (37/100 vs 34/100)
- Longer battery life (78/100 vs 46/100)
- Better display (94/100 vs 83/100)
Comparison verdict
Comparing the Nubia Air vs the Redmi K90 Ultra, the Redmi K90 Ultra scores 22 points higher (73/100 vs 51/100). In the "performance" category, the Redmi K90 Ultra leads (92/100 vs 47/100). In the "battery" category, the Redmi K90 Ultra leads (78/100 vs 46/100). Value score: Nubia Air — 64/100, Redmi K90 Ultra — 72/100; 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 significantly outperforms the Nubia Air (92/100 vs 47/100). In the "display" category, the Redmi K90 Ultra is a bit better (94/100 vs 83/100). In the "camera" category, the Redmi K90 Ultra and the Nubia Air are nearly equal (37/100 vs 34/100). In the "battery" category, the Redmi K90 Ultra significantly outperforms the Nubia Air (78/100 vs 46/100). In the "portability" category, the Nubia Air significantly outperforms the Redmi K90 Ultra (90/100 vs 40/100).
Specs comparison
| Specification | Nubia Air | Redmi K90 Ultra | |
|---|---|---|---|
| Processor | Unisoc T8300 | Qualcomm Snapdragon 8 Elite | |
| AnTuTu | 639225 | 3233695 | |
| Geekbench Single | 880 | 3013 | |
| Geekbench Multi | 2073 | 9287 | |
| Display | 6.8" AMOLED | 6.8" AMOLED | |
| Resolution | 1224x2720 | 1280x2772 | |
| Refresh rate | 120 Hz | 165 Hz | |
| Battery | 5000 mAh | 8550 mAh | |
| Charging | 33W | 100W | |
| Main camera | 50 MP | 50 MP | |
| Ultrawide | 0 MP | 8 MP | |
| Front camera | 20 MP | 20 MP | |
| RAM | 8GB | 12GB / 16GB | |
| Storage | 256GB | 256GB / 512GB | |
| OS | Android 15 | Android 16 | |
| Brightness (peak) | 4500 nits | 3500 nits | |
| NFC | yes | yes | |
| Protection | IP68/IP69K | IP68/IP69 | |
| Dimensions | 164.2×76.6×6.7 mm | 162.9×77.9×8.2 mm | |
| Weight | 172 g | 227 g | |
| Launch price | $199 | $420 |
Camera comparison
Nubia Air
- Main: 50MP f/1.6
- Front: 20MP
Redmi K90 Ultra
- Main: 50MP f/1.7
- Ultrawide: 8MP
- Front: 20MP
Display comparison
Nubia Air
- 6.8" AMOLED
- Resolution: 1224x2720
- Refresh rate: 120 Hz
Redmi K90 Ultra
- 6.8" AMOLED
- Resolution: 1280x2772
- Refresh rate: 165 Hz
Battery and charging
Nubia Air
- 5000 mAh
- Wired: 33W
- No wireless charging
Redmi K90 Ultra
- 8550 mAh
- Wired: 100W
- No wireless charging
Overall performance score
We compared Nubia Air and Redmi K90 Ultra, covering their specs and all relevant benchmarks.
Redmi K90 Ultra leads Nubia Air by 80.2% in our overall performance rating.
Benchmarks
Launch prices and where to check today's
Launch price difference: $221. Nubia Air was $221 cheaper at launch.
Detailed category analysis
performance
In the "performance" category, the Redmi K90 Ultra significantly outperforms the Nubia Air (92/100 vs 47/100).
display
In the "display" category, the Redmi K90 Ultra is a bit better (94/100 vs 83/100).
camera
In the "camera" category, the Redmi K90 Ultra and the Nubia Air are nearly equal (37/100 vs 34/100).
battery
In the "battery" category, the Redmi K90 Ultra significantly outperforms the Nubia Air (78/100 vs 46/100).
portability
In the "portability" category, the Nubia Air significantly outperforms the Redmi K90 Ultra (90/100 vs 40/100).
Frequently asked questions
Which is better: the Nubia Air or the Redmi K90 Ultra?
The Redmi K90 Ultra significantly outperforms the Nubia Air by 22 points (73/100 vs 51/100).
What is the rating of the Nubia Air and the Redmi K90 Ultra?
The Nubia Air has a MobileRank rating of 51/100, the Redmi K90 Ultra — 73/100.
Which is more powerful: the Nubia Air or the Redmi K90 Ultra?
The Redmi K90 Ultra leads on performance (92/100 vs 47/100).
Should you choose the Nubia Air over the Redmi K90 Ultra?
The Redmi K90 Ultra is a better fit for gamers and power users, those who care about battery life.