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; estimated prices are $799 and $420. By overall MobileRank rating, the Nubia Z70S Ultra leads — 70/100 vs 61/100 (a 9-point difference). Key differences: the Redmi K90 Ultra has the bigger battery (8550 mAh vs 6600); the Nubia Z70S Ultra is faster in AnTuTu (3,228,937 vs 2,760,000).
Nubia Z70S Ultra
Redmi K90 Ultra
- Higher AnTuTu: 3228937 vs 2760000
- Higher performance (71/100 vs 65/100)
- Better camera (74/100 vs 32/100)
- Bigger battery: 8550 vs 6600 mAh
- Faster charging: 100W vs 80W
- Higher refresh rate: 165Hz vs 144Hz
- Lighter: 227g vs 228g
- Cheaper: $420 vs $799
- Longer battery life (77/100 vs 63/100)
- Better design/ergonomics (16/100 vs 15/100)
- Better value for money (81/100 vs 55/100)
Comparing the Nubia Z70S Ultra vs the Redmi K90 Ultra, the Nubia Z70S Ultra scores 9 points higher (70/100 vs 61/100). In the "camera" category, the Nubia Z70S Ultra leads (74/100 vs 32/100). In the "battery" category, the Redmi K90 Ultra leads (77/100 vs 63/100). In the "value for money" category, the Redmi K90 Ultra leads (81/100 vs 55/100). In the "performance" category, the Nubia Z70S Ultra is a bit better (71/100 vs 65/100). In the "display" category, both devices are on the same level — 100/100. In the "camera" category, the Nubia Z70S Ultra significantly outperforms the Redmi K90 Ultra (74/100 vs 32/100). In the "battery" category, the Redmi K90 Ultra is a bit better (77/100 vs 63/100). In the "design" category, the Redmi K90 Ultra and the Nubia Z70S Ultra are nearly equal (16/100 vs 15/100). In the "value for money" category, the Redmi K90 Ultra notably outperforms the Nubia Z70S Ultra (81/100 vs 55/100).
| Specification | Nubia Z70S Ultra | Redmi K90 Ultra | |
|---|---|---|---|
| Processor | Qualcomm Snapdragon 8 Elite | Qualcomm Snapdragon 8 Elite | |
| AnTuTu | 3228937 | 2760000 | |
| Geekbench Single | 3050 | 3050 | |
| Geekbench Multi | 9300 | 9300 | |
| 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, Nebula AIOS 1.5 | Android 16 | |
| Brightness (peak) | 2000 nits | 3500 nits | |
| NFC | yes | yes | |
| Protection | IP68 | IP68/IP69 | |
| Dimensions | 164.3×77.1×8.6 mm | 162.9×77.9×8.2 mm | |
| Weight | 228 g | 227 g | |
| Price | $799 | $420 |
Nubia Z70S Ultra
- Main: 50MP f/f/1.7
- Ultrawide: 50MP
- Telephoto: 64MP
- Front: 16MP
Redmi K90 Ultra
- Main: 50MP f/1.7
- Ultrawide: 8MP
- Front: 20MP
Nubia Z70S Ultra
- 6.8" AMOLED
- Resolution: 1216x2688
- Refresh rate: 144 Hz
Redmi K90 Ultra
- 6.8" AMOLED
- Resolution: 1280x2772
- Refresh rate: 165 Hz
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
We compared Nubia Z70S Ultra and Redmi K90 Ultra, covering their specs and all relevant benchmarks.
Nubia Z70S Ultra leads Redmi K90 Ultra by 17.0% in our overall performance rating.
Price difference: $379. Redmi K90 Ultra is cheaper by $379.
performance
In the "performance" category, the Nubia Z70S Ultra is a bit better (71/100 vs 65/100).
display
In the "display" category, both devices are on the same level — 100/100.
camera
In the "camera" category, the Nubia Z70S Ultra significantly outperforms the Redmi K90 Ultra (74/100 vs 32/100).
battery
In the "battery" category, the Redmi K90 Ultra is a bit better (77/100 vs 63/100).
design
In the "design" category, the Redmi K90 Ultra and the Nubia Z70S Ultra are nearly equal (16/100 vs 15/100).
value for money
In the "value for money" category, the Redmi K90 Ultra notably outperforms the Nubia Z70S Ultra (81/100 vs 55/100).
Which is better: the Nubia Z70S Ultra or the Redmi K90 Ultra?
The Nubia Z70S Ultra edges out the Redmi K90 Ultra by just 9 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 70/100, the Redmi K90 Ultra — 61/100.
Which has the better camera: the Nubia Z70S Ultra or the Redmi K90 Ultra?
The Nubia Z70S Ultra leads on camera score (74/100 vs 32/100).
Which is more powerful: the Nubia Z70S Ultra or the Redmi K90 Ultra?
The Nubia Z70S Ultra leads on performance (71/100 vs 65/100).
Should you choose the Nubia Z70S Ultra over the Redmi K90 Ultra?
The Nubia Z70S Ultra is a better fit for active users. The Redmi K90 Ultra is a better fit for active users, those who care about battery life, budget-conscious buyers.