Redmi K90 Ultra vs ZTE Axon 31 Ultra 5G
The Redmi K90 Ultra (2026) runs on the Qualcomm Snapdragon 8 Elite, while the ZTE Axon 31 Ultra 5G (2021) runs on the Qualcomm Snapdragon 888. By overall MobileRank rating, the Redmi K90 Ultra leads — 73/100 vs 65/100 (a 8-point difference). Key differences: the Redmi K90 Ultra has the bigger battery (8550 mAh vs 4600); the main camera is 50 MP vs 64 MP; the Redmi K90 Ultra is faster in AnTuTu (3,233,695 vs 1,135,878); the ZTE Axon 31 Ultra 5G is noticeably lighter (188g vs 227g).
Profile comparison
Category scores
Redmi K90 Ultra
ZTE Axon 31 Ultra 5G
What makes Redmi K90 Ultra better?
- Higher AnTuTu: 3233695 vs 1135878
- Better Geekbench Single: 3013 vs 1500
- Better Geekbench Multi: 9287 vs 3537
- Bigger battery: 8550 vs 4600 mAh
- Higher refresh rate: 165Hz vs 144Hz
- Higher performance (92/100 vs 64/100)
- Longer battery life (78/100 vs 41/100)
- Better display (94/100 vs 89/100)
What makes ZTE Axon 31 Ultra 5G better?
- Better main camera: 64MP vs 50MP
- Lighter: 188g vs 227g
- Better camera (71/100 vs 37/100)
- Better portability (67/100 vs 40/100)
Comparison verdict
Comparing the Redmi K90 Ultra vs the ZTE Axon 31 Ultra 5G, the Redmi K90 Ultra scores 8 points higher (73/100 vs 65/100). In the "performance" category, the Redmi K90 Ultra leads (92/100 vs 64/100). In the "camera" category, the ZTE Axon 31 Ultra 5G leads (71/100 vs 37/100). In the "battery" category, the Redmi K90 Ultra leads (78/100 vs 41/100). In the "performance" category, the Redmi K90 Ultra notably outperforms the ZTE Axon 31 Ultra 5G (92/100 vs 64/100). In the "display" category, the Redmi K90 Ultra is a bit better (94/100 vs 89/100). In the "camera" category, the ZTE Axon 31 Ultra 5G significantly outperforms the Redmi K90 Ultra (71/100 vs 37/100). In the "battery" category, the Redmi K90 Ultra significantly outperforms the ZTE Axon 31 Ultra 5G (78/100 vs 41/100). In the "portability" category, the ZTE Axon 31 Ultra 5G notably outperforms the Redmi K90 Ultra (67/100 vs 40/100).
Specs comparison
| Specification | Redmi K90 Ultra | ZTE Axon 31 Ultra 5G | |
|---|---|---|---|
| Processor | Qualcomm Snapdragon 8 Elite | Qualcomm Snapdragon 888 | |
| AnTuTu | 3233695 | 1135878 | |
| Geekbench Single | 3013 | 1500 | |
| Geekbench Multi | 9287 | 3537 | |
| Display | 6.8" AMOLED | 6.7" Super Amoled | |
| Resolution | 1280x2772 | 1080x2400 | |
| Refresh rate | 165 Hz | 144 Hz | |
| Battery | 8550 mAh | 4600 mAh | |
| Charging | 100W | — | |
| Main camera | 50 MP | 64 MP | |
| Ultrawide | 8 MP | 64 MP | |
| Telephoto | 0 MP | 8 MP | |
| Front camera | 20 MP | 44 MP | |
| RAM | 12GB / 16GB | — | |
| Storage | 256GB / 512GB | 512GB | |
| OS | Android 16 | Android 11 Red Velvet Cake | |
| Brightness (peak) | 3500 nits | — | |
| NFC | yes | yes | |
| Protection | IP68/IP69 | — | |
| Dimensions | 162.9×77.9×8.2 mm | 161.5×73.0×8.0 mm | |
| Weight | 227 g | 188 g | |
| Launch price | $420 | — |
Camera comparison
Redmi K90 Ultra
- Main: 50MP f/1.7
- Ultrawide: 8MP
- Front: 20MP
ZTE Axon 31 Ultra 5G
- Main: 64MP
- Ultrawide: 64MP
- Telephoto: 8MP
- Front: 44MP
Display comparison
Redmi K90 Ultra
- 6.8" AMOLED
- Resolution: 1280x2772
- Refresh rate: 165 Hz
ZTE Axon 31 Ultra 5G
- 6.7" Super Amoled
- Resolution: 1080x2400
- Refresh rate: 144 Hz
Battery and charging
Redmi K90 Ultra
- 8550 mAh
- Wired: 100W
- No wireless charging
ZTE Axon 31 Ultra 5G
- 4600 mAh
- No wireless charging
Overall performance score
We compared Redmi K90 Ultra and ZTE Axon 31 Ultra 5G, covering their specs and all relevant benchmarks.
Redmi K90 Ultra leads ZTE Axon 31 Ultra 5G by 184.7% in our overall performance rating.
Benchmarks
Launch prices and where to check today's
ZTE Axon 31 Ultra 5G
Price unknownDetailed category analysis
performance
In the "performance" category, the Redmi K90 Ultra notably outperforms the ZTE Axon 31 Ultra 5G (92/100 vs 64/100).
display
In the "display" category, the Redmi K90 Ultra is a bit better (94/100 vs 89/100).
camera
In the "camera" category, the ZTE Axon 31 Ultra 5G significantly outperforms the Redmi K90 Ultra (71/100 vs 37/100).
battery
In the "battery" category, the Redmi K90 Ultra significantly outperforms the ZTE Axon 31 Ultra 5G (78/100 vs 41/100).
portability
In the "portability" category, the ZTE Axon 31 Ultra 5G notably outperforms the Redmi K90 Ultra (67/100 vs 40/100).
Frequently asked questions
Which is better: the Redmi K90 Ultra or the ZTE Axon 31 Ultra 5G?
The Redmi K90 Ultra edges out the ZTE Axon 31 Ultra 5G by just 8 points — the two devices are very close in overall level.
What is the rating of the Redmi K90 Ultra and the ZTE Axon 31 Ultra 5G?
The Redmi K90 Ultra has a MobileRank rating of 73/100, the ZTE Axon 31 Ultra 5G — 65/100.
Which has the better camera: the Redmi K90 Ultra or the ZTE Axon 31 Ultra 5G?
The ZTE Axon 31 Ultra 5G leads on camera score (71/100 vs 37/100).
Which is more powerful: the Redmi K90 Ultra or the ZTE Axon 31 Ultra 5G?
The Redmi K90 Ultra leads on performance (92/100 vs 64/100).
Should you choose the Redmi K90 Ultra over the ZTE Axon 31 Ultra 5G?
The Redmi K90 Ultra is a better fit for gamers and power users, those who care about battery life. The ZTE Axon 31 Ultra 5G is a better fit for active users.