Nubia Z70S Ultra vs Redmi K90 Ultra
The Nubia Z70S Ultra (2025) runs on the Qualcomm Snapdragon 8 Elite, while the Redmi K90 Ultra (2026) runs on the Qualcomm Snapdragon 8 Elite; launch prices were $600 and $420. By overall MobileRank rating, the Nubia Z70S Ultra leads — 81/100 vs 73/100 (a 8-point difference). Key differences: the Redmi K90 Ultra has the bigger battery (8550 mAh vs 6600); the Redmi K90 Ultra is faster in AnTuTu (3,233,695 vs 3,228,937).
Profile comparison
Category scores
Nubia Z70S Ultra
Redmi K90 Ultra
What makes Nubia Z70S Ultra better?
- Better camera (79/100 vs 37/100)
What makes Redmi K90 Ultra better?
- Higher AnTuTu: 3233695 vs 3228937
- Bigger battery: 8550 vs 6600 mAh
- Faster charging: 100W vs 80W
- Higher refresh rate: 165Hz vs 144Hz
- Lighter: 227g vs 228g
- Cheaper at launch: $420 vs $600
- Longer battery life (78/100 vs 66/100)
- Better display (94/100 vs 93/100)
- Better portability (40/100 vs 36/100)
Comparison verdict
Comparing the Nubia Z70S Ultra vs the Redmi K90 Ultra, the Nubia Z70S Ultra scores 8 points higher (81/100 vs 73/100). In the "camera" category, the Nubia Z70S Ultra leads (79/100 vs 37/100). In the "battery" category, the Redmi K90 Ultra leads (78/100 vs 66/100). Value score: Nubia Z70S Ultra — 76/100, 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, both devices are on the same level — 92/100. In the "display" category, the Redmi K90 Ultra and the Nubia Z70S Ultra are nearly equal (94/100 vs 93/100). In the "camera" category, the Nubia Z70S Ultra significantly outperforms the Redmi K90 Ultra (79/100 vs 37/100). In the "battery" category, the Redmi K90 Ultra is a bit better (78/100 vs 66/100). In the "portability" category, the Redmi K90 Ultra and the Nubia Z70S Ultra are nearly equal (40/100 vs 36/100).
Specs comparison
| Specification | Nubia Z70S Ultra | Redmi K90 Ultra | |
|---|---|---|---|
| Processor | Qualcomm Snapdragon 8 Elite | Qualcomm Snapdragon 8 Elite | |
| AnTuTu | 3228937 | 3233695 | |
| Geekbench Single | 3013 | 3013 | |
| Geekbench Multi | 9287 | 9287 | |
| Display | 6.8" AMOLED | 6.8" AMOLED | |
| Resolution | 1216x2688 | 1280x2772 | |
| Refresh rate | 144 Hz | 165 Hz | |
| Battery | 6600 mAh | 8550 mAh | |
| Charging | 80W | 100W | |
| Main camera | 50 MP | 50 MP | |
| Ultrawide | 50 MP | 8 MP | |
| Telephoto | 64 MP | 0 MP | |
| Front camera | 16 MP | 20 MP | |
| RAM | 12GB / 16GB / 24GB | 12GB / 16GB | |
| Storage | 256GB / 512GB / 1TB | 256GB / 512GB | |
| OS | Android 15 | Android 16 | |
| Brightness (peak) | 2000 nits | 3500 nits | |
| NFC | yes | yes | |
| Protection | IP68/IP69 | IP68/IP69 | |
| Dimensions | 164.3×77.1×8.6 mm | 162.9×77.9×8.2 mm | |
| Weight | 228 g | 227 g | |
| Launch price | $600 | $420 |
Camera comparison
Nubia Z70S Ultra
- Main: 50MP f/1.7
- Ultrawide: 50MP
- Telephoto: 64MP
- Front: 16MP
Redmi K90 Ultra
- Main: 50MP f/1.7
- Ultrawide: 8MP
- Front: 20MP
Display comparison
Nubia Z70S Ultra
- 6.8" AMOLED
- Resolution: 1216x2688
- Refresh rate: 144 Hz
Redmi K90 Ultra
- 6.8" AMOLED
- Resolution: 1280x2772
- Refresh rate: 165 Hz
Battery and charging
Nubia Z70S Ultra
- 6600 mAh
- NanoReview test: web browsing 7:53 hrs, total 22:56 hrs
- Wired: 80W
- No wireless charging
Redmi K90 Ultra
- 8550 mAh
- Wired: 100W
- No wireless charging
Overall performance score
We compared Nubia Z70S Ultra and Redmi K90 Ultra, covering their specs and all relevant benchmarks.
Redmi K90 Ultra leads Nubia Z70S Ultra by 0.1% in our overall performance rating.
Benchmarks
Launch prices and where to check today's
Launch price difference: $180. Redmi K90 Ultra was $180 cheaper at launch.
Detailed category analysis
performance
In the "performance" category, both devices are on the same level — 92/100.
display
In the "display" category, the Redmi K90 Ultra and the Nubia Z70S Ultra are nearly equal (94/100 vs 93/100).
camera
In the "camera" category, the Nubia Z70S Ultra significantly outperforms the Redmi K90 Ultra (79/100 vs 37/100).
battery
In the "battery" category, the Redmi K90 Ultra is a bit better (78/100 vs 66/100).
portability
In the "portability" category, the Redmi K90 Ultra and the Nubia Z70S Ultra are nearly equal (40/100 vs 36/100).
Frequently asked questions
Which is better: the Nubia Z70S Ultra or the Redmi K90 Ultra?
The Nubia Z70S Ultra edges out the Redmi K90 Ultra by just 8 points — the two devices are very close in overall level.
What is the rating of the Nubia Z70S Ultra and the Redmi K90 Ultra?
The Nubia Z70S Ultra has a MobileRank rating of 81/100, the Redmi K90 Ultra — 73/100.
Which has the better camera: the Nubia Z70S Ultra or the Redmi K90 Ultra?
The Nubia Z70S Ultra leads on camera score (79/100 vs 37/100).
Should you choose the Nubia Z70S Ultra over the Redmi K90 Ultra?
The Nubia Z70S Ultra is a better fit for gamers and power users, budget-conscious buyers. The Redmi K90 Ultra is a better fit for gamers and power users, those who care about battery life.