Nubia Z70S Ultra vs Redmi K90
The Nubia Z70S Ultra (2025) runs on the Qualcomm Snapdragon 8 Elite, while the Redmi K90 (2025) runs on the Qualcomm Snapdragon 8 Elite; launch prices were $600 and $401. By overall MobileRank rating, the Nubia Z70S Ultra leads — 81/100 vs 76/100 (a 5-point difference). Key differences: the Redmi K90 has the bigger battery (7100 mAh vs 6600); the Nubia Z70S Ultra is faster in AnTuTu (3,228,937 vs 3,077,585); the Redmi K90 is noticeably lighter (206g vs 228g).
Profile comparison
Category scores
Nubia Z70S Ultra
Redmi K90
What makes Nubia Z70S Ultra better?
- Higher AnTuTu: 3228937 vs 3077585
- Higher refresh rate: 144Hz vs 120Hz
- Higher performance (92/100 vs 91/100)
- Better camera (79/100 vs 58/100)
- Better display (93/100 vs 82/100)
What makes Redmi K90 better?
- Bigger battery: 7100 vs 6600 mAh
- Faster charging: 100W vs 80W
- Lighter: 206g vs 228g
- Cheaper at launch: $401 vs $600
- Longer battery life (72/100 vs 66/100)
- Better portability (55/100 vs 36/100)
Comparison verdict
Comparing the Nubia Z70S Ultra vs the Redmi K90, the Nubia Z70S Ultra scores 5 points higher (81/100 vs 76/100). In the "camera" category, the Nubia Z70S Ultra leads (79/100 vs 58/100). Value score: Nubia Z70S Ultra — 76/100, Redmi K90 — 80/100; 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 Nubia Z70S Ultra and the Redmi K90 are nearly equal (92/100 vs 91/100). In the "display" category, the Nubia Z70S Ultra is a bit better (93/100 vs 82/100). In the "camera" category, the Nubia Z70S Ultra notably outperforms the Redmi K90 (79/100 vs 58/100). In the "battery" category, the Redmi K90 is a bit better (72/100 vs 66/100). In the "portability" category, the Redmi K90 notably outperforms the Nubia Z70S Ultra (55/100 vs 36/100).
Specs comparison
| Specification | Nubia Z70S Ultra | Redmi K90 | |
|---|---|---|---|
| Processor | Qualcomm Snapdragon 8 Elite | Qualcomm Snapdragon 8 Elite | |
| AnTuTu | 3228937 | 3077585 | |
| Geekbench Single | 3013 | 3013 | |
| Geekbench Multi | 9287 | 9287 | |
| Display | 6.8" AMOLED | 6.6" AMOLED | |
| Resolution | 1216x2688 | 2510x1156 | |
| Refresh rate | 144 Hz | 120 Hz | |
| Battery | 6600 mAh | 7100 mAh | |
| Charging | 80W | 100W | |
| Main camera | 50 MP | 50 MP | |
| Ultrawide | 50 MP | 8 MP | |
| Telephoto | 64 MP | 50 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 | |
| Dimensions | 164.3×77.1×8.6 mm | 157.5×75.3×8.0 mm | |
| Weight | 228 g | 206 g | |
| Launch price | $600 | $401 |
Camera comparison
Nubia Z70S Ultra
- Main: 50MP f/1.7
- Ultrawide: 50MP
- Telephoto: 64MP
- Front: 16MP
Redmi K90
- Main: 50MP f/1.9
- Ultrawide: 8MP
- Telephoto: 50MP
- Front: 20MP
Display comparison
Nubia Z70S Ultra
- 6.8" AMOLED
- Resolution: 1216x2688
- Refresh rate: 144 Hz
Redmi K90
- 6.6" AMOLED
- Resolution: 2510x1156
- Refresh rate: 120 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
- 7100 mAh
- Wired: 100W
- No wireless charging
Overall performance score
We compared Nubia Z70S Ultra and Redmi K90, covering their specs and all relevant benchmarks.
Nubia Z70S Ultra leads Redmi K90 by 4.9% in our overall performance rating.
Benchmarks
Launch prices and where to check today's
Launch price difference: $199. Redmi K90 was $199 cheaper at launch.
Detailed category analysis
performance
In the "performance" category, the Nubia Z70S Ultra and the Redmi K90 are nearly equal (92/100 vs 91/100).
display
In the "display" category, the Nubia Z70S Ultra is a bit better (93/100 vs 82/100).
camera
In the "camera" category, the Nubia Z70S Ultra notably outperforms the Redmi K90 (79/100 vs 58/100).
battery
In the "battery" category, the Redmi K90 is a bit better (72/100 vs 66/100).
portability
In the "portability" category, the Redmi K90 notably outperforms the Nubia Z70S Ultra (55/100 vs 36/100).
Frequently asked questions
Which is better: the Nubia Z70S Ultra or the Redmi K90?
The Nubia Z70S Ultra edges out the Redmi K90 by just 5 points — the two devices are very close in overall level.
What is the rating of the Nubia Z70S Ultra and the Redmi K90?
The Nubia Z70S Ultra has a MobileRank rating of 81/100, the Redmi K90 — 76/100.
Which has the better camera: the Nubia Z70S Ultra or the Redmi K90?
The Nubia Z70S Ultra leads on camera score (79/100 vs 58/100).
Should you choose the Nubia Z70S Ultra over the Redmi K90?
The Nubia Z70S Ultra is a better fit for gamers and power users, budget-conscious buyers. The Redmi K90 is a better fit for gamers and power users, budget-conscious buyers.