Nothing Phone (4b) vs Redmi K90 Ultra
The Nothing Phone (4b) (2026) runs on the Qualcomm Snapdragon 6 Gen 4, while the Redmi K90 Ultra (2026) runs on the Qualcomm Snapdragon 8 Elite; estimated prices are $355 and $420. By overall MobileRank rating, the Redmi K90 Ultra leads — 73/100 vs 55/100 (a 18-point difference). Key differences: the Redmi K90 Ultra has the bigger battery (8550 mAh vs 5200); the Redmi K90 Ultra is faster in AnTuTu (3,119,308 vs 969,048); the Nothing Phone (4b) is noticeably lighter (210g vs 227g).
Nothing Phone (4b)
Redmi K90 Ultra
- Lighter: 210g vs 227g
- Cheaper: $355 vs $420
- Better portability (47/100 vs 40/100)
- Higher AnTuTu: 3119308 vs 969048
- Better Geekbench Single: 3041 vs 1071
- Better Geekbench Multi: 9494 vs 3057
- Bigger battery: 8550 vs 5200 mAh
- Faster charging: 100W vs 33W
- Higher refresh rate: 165Hz vs 120Hz
- Higher performance (92/100 vs 58/100)
- Better camera (37/100 vs 35/100)
- Longer battery life (78/100 vs 59/100)
- Better display (94/100 vs 79/100)
Comparing the Nothing Phone (4b) vs the Redmi K90 Ultra, the Redmi K90 Ultra scores 18 points higher (73/100 vs 55/100). In the "performance" category, the Redmi K90 Ultra leads (92/100 vs 58/100). In the "battery" category, the Redmi K90 Ultra leads (78/100 vs 59/100). In the "performance" category, the Redmi K90 Ultra significantly outperforms the Nothing Phone (4b) (92/100 vs 58/100). In the "display" category, the Redmi K90 Ultra notably outperforms the Nothing Phone (4b) (94/100 vs 79/100). In the "camera" category, the Redmi K90 Ultra and the Nothing Phone (4b) are nearly equal (37/100 vs 35/100). In the "battery" category, the Redmi K90 Ultra notably outperforms the Nothing Phone (4b) (78/100 vs 59/100). In the "portability" category, the Nothing Phone (4b) is a bit better (47/100 vs 40/100).
| Specification | Nothing Phone (4b) | Redmi K90 Ultra | |
|---|---|---|---|
| Processor | Qualcomm Snapdragon 6 Gen 4 | Qualcomm Snapdragon 8 Elite | |
| AnTuTu | 969048 | 3119308 | |
| Geekbench Single | 1071 | 3041 | |
| Geekbench Multi | 3057 | 9494 | |
| Display | 6.8" AMOLED | 6.8" AMOLED | |
| Resolution | 1080x2344 | 1280x2772 | |
| Refresh rate | 120 Hz | 165 Hz | |
| Battery | 5200 mAh | 8550 mAh | |
| Charging | 33W | 100W | |
| Main camera | 50 MP | 50 MP | |
| Ultrawide | 8 MP | 8 MP | |
| Front camera | 16 MP | 20 MP | |
| RAM | 8GB | 12GB / 16GB | |
| Storage | 128GB / 256GB | 256GB / 512GB | |
| OS | Android 16 | Android 16 | |
| Brightness (peak) | 2000 nits | 3500 nits | |
| NFC | yes | yes | |
| Protection | IP64 | IP68/IP69 | |
| Dimensions | 164.4×78.2×8.6 mm | 162.9×77.9×8.2 mm | |
| Weight | 210 g | 227 g | |
| Price | $355 | $420 |
Nothing Phone (4b)
- Main: 50MP f/1.8
- Ultrawide: 8MP
- Front: 16MP
Redmi K90 Ultra
- Main: 50MP f/1.7
- Ultrawide: 8MP
- Front: 20MP
Nothing Phone (4b)
- 6.8" AMOLED
- Resolution: 1080x2344
- Refresh rate: 120 Hz
Redmi K90 Ultra
- 6.8" AMOLED
- Resolution: 1280x2772
- Refresh rate: 165 Hz
Nothing Phone (4b)
- 5200 mAh
- Wired: 33W
- Wireless charging: no data
Redmi K90 Ultra
- 8550 mAh
- Wired: 100W
- No wireless charging
We compared Nothing Phone (4b) and Redmi K90 Ultra, covering their specs and all relevant benchmarks.
Redmi K90 Ultra leads Nothing Phone (4b) by 68.9% in our overall performance rating.
Price difference: $65. Nothing Phone (4b) is cheaper by $65.
performance
In the "performance" category, the Redmi K90 Ultra significantly outperforms the Nothing Phone (4b) (92/100 vs 58/100).
display
In the "display" category, the Redmi K90 Ultra notably outperforms the Nothing Phone (4b) (94/100 vs 79/100).
camera
In the "camera" category, the Redmi K90 Ultra and the Nothing Phone (4b) are nearly equal (37/100 vs 35/100).
battery
In the "battery" category, the Redmi K90 Ultra notably outperforms the Nothing Phone (4b) (78/100 vs 59/100).
portability
In the "portability" category, the Nothing Phone (4b) is a bit better (47/100 vs 40/100).
Which is better: the Nothing Phone (4b) or the Redmi K90 Ultra?
The Redmi K90 Ultra is noticeably better than the Nothing Phone (4b) — the overall rating gap is 18 points.
What is the rating of the Nothing Phone (4b) and the Redmi K90 Ultra?
The Nothing Phone (4b) has a MobileRank rating of 55/100, the Redmi K90 Ultra — 73/100.
Which is more powerful: the Nothing Phone (4b) or the Redmi K90 Ultra?
The Redmi K90 Ultra leads on performance (92/100 vs 58/100).
Should you choose the Nothing Phone (4b) over the Redmi K90 Ultra?
The Nothing Phone (4b) 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.