Infinix Zero X vs Redmi K90 Ultra
The Infinix Zero X (2021) runs on the MediaTek Helio G95, while the Redmi K90 Ultra (2026) runs on the Qualcomm Snapdragon 8 Elite. By overall MobileRank rating, the Redmi K90 Ultra leads — 73/100 vs 49/100 (a 24-point difference). Key differences: the Redmi K90 Ultra has the bigger battery (8550 mAh vs 4500); the main camera is 64 MP vs 50 MP; the Redmi K90 Ultra is faster in AnTuTu (3,233,695 vs 535,127); the Redmi K90 Ultra has NFC for contactless payments, the Infinix Zero X doesn't; the Infinix Zero X is noticeably lighter (193g vs 227g).
Profile comparison
Category scores
Infinix Zero X
Redmi K90 Ultra
What makes Infinix Zero X better?
- Better main camera: 64MP vs 50MP
- Lighter: 193g vs 227g
- Better camera (46/100 vs 37/100)
- Better portability (65/100 vs 40/100)
What makes Redmi K90 Ultra better?
- Higher AnTuTu: 3233695 vs 535127
- Better Geekbench Single: 3013 vs 672
- Better Geekbench Multi: 9287 vs 1908
- Bigger battery: 8550 vs 4500 mAh
- Faster charging: 100W vs 45W
- Higher refresh rate: 165Hz vs 120Hz
- Higher performance (92/100 vs 42/100)
- Longer battery life (78/100 vs 38/100)
- Better display (94/100 vs 79/100)
Comparison verdict
Comparing the Infinix Zero X vs the Redmi K90 Ultra, the Redmi K90 Ultra scores 24 points higher (73/100 vs 49/100). In the "performance" category, the Redmi K90 Ultra leads (92/100 vs 42/100). In the "battery" category, the Redmi K90 Ultra leads (78/100 vs 38/100). In the "performance" category, the Redmi K90 Ultra significantly outperforms the Infinix Zero X (92/100 vs 42/100). In the "display" category, the Redmi K90 Ultra notably outperforms the Infinix Zero X (94/100 vs 79/100). In the "camera" category, the Infinix Zero X is a bit better (46/100 vs 37/100). In the "battery" category, the Redmi K90 Ultra significantly outperforms the Infinix Zero X (78/100 vs 38/100). In the "portability" category, the Infinix Zero X notably outperforms the Redmi K90 Ultra (65/100 vs 40/100).
Specs comparison
| Specification | Infinix Zero X | Redmi K90 Ultra | |
|---|---|---|---|
| Processor | MediaTek Helio G95 | Qualcomm Snapdragon 8 Elite | |
| AnTuTu | 535127 | 3233695 | |
| Geekbench Single | 672 | 3013 | |
| Geekbench Multi | 1908 | 9287 | |
| Display | 6.7" AMOLED | 6.8" AMOLED | |
| Resolution | 1080x2400 | 1280x2772 | |
| Refresh rate | 120 Hz | 165 Hz | |
| Battery | 4500 mAh | 8550 mAh | |
| Charging | 45W | 100W | |
| Main camera | 64 MP | 50 MP | |
| Ultrawide | 8 MP | 8 MP | |
| Telephoto | 8 MP | 0 MP | |
| Front camera | 16 MP | 20 MP | |
| RAM | 8GB | 12GB / 16GB | |
| Storage | 128GB | 256GB / 512GB | |
| OS | Android 11, XOS 7.6 | Android 16 | |
| Brightness (peak) | 700 nits | 3500 nits | |
| NFC | no | yes | |
| Protection | — | IP68/IP69 | |
| Dimensions | 164.1×75.7×7.8 mm | 162.9×77.9×8.2 mm | |
| Weight | 193 g | 227 g | |
| Launch price | — | $420 |
Camera comparison
Infinix Zero X
- Main: 64MP f/1.9
- Ultrawide: 8MP
- Telephoto: 8MP
- Front: 16MP
Redmi K90 Ultra
- Main: 50MP f/1.7
- Ultrawide: 8MP
- Front: 20MP
Display comparison
Infinix Zero X
- 6.7" AMOLED
- Resolution: 1080x2400
- Refresh rate: 120 Hz
Redmi K90 Ultra
- 6.8" AMOLED
- Resolution: 1280x2772
- Refresh rate: 165 Hz
Battery and charging
Infinix Zero X
- 4500 mAh
- Wired: 45W
- No wireless charging
Redmi K90 Ultra
- 8550 mAh
- Wired: 100W
- No wireless charging
Overall performance score
We compared Infinix Zero X and Redmi K90 Ultra, covering their specs and all relevant benchmarks.
Redmi K90 Ultra leads Infinix Zero X by 83.5% in our overall performance rating.
Benchmarks
Launch prices and where to check today's
Infinix Zero X
Price unknownDetailed category analysis
performance
In the "performance" category, the Redmi K90 Ultra significantly outperforms the Infinix Zero X (92/100 vs 42/100).
display
In the "display" category, the Redmi K90 Ultra notably outperforms the Infinix Zero X (94/100 vs 79/100).
camera
In the "camera" category, the Infinix Zero X is a bit better (46/100 vs 37/100).
battery
In the "battery" category, the Redmi K90 Ultra significantly outperforms the Infinix Zero X (78/100 vs 38/100).
portability
In the "portability" category, the Infinix Zero X notably outperforms the Redmi K90 Ultra (65/100 vs 40/100).
Frequently asked questions
Which is better: the Infinix Zero X or the Redmi K90 Ultra?
The Redmi K90 Ultra significantly outperforms the Infinix Zero X by 24 points (73/100 vs 49/100).
What is the rating of the Infinix Zero X and the Redmi K90 Ultra?
The Infinix Zero X has a MobileRank rating of 49/100, the Redmi K90 Ultra — 73/100.
Which has the better camera: the Infinix Zero X or the Redmi K90 Ultra?
The Infinix Zero X leads on camera score (46/100 vs 37/100).
Which is more powerful: the Infinix Zero X or the Redmi K90 Ultra?
The Redmi K90 Ultra leads on performance (92/100 vs 42/100).
Should you choose the Infinix Zero X over the Redmi K90 Ultra?
The Redmi K90 Ultra is a better fit for gamers and power users, those who care about battery life.