Infinix Smart 20 vs Redmi K90 Ultra
The Infinix Smart 20 (2026) runs on the MediaTek Helio G81 Ultimate, while the Redmi K90 Ultra (2026) runs on the Qualcomm Snapdragon 8 Elite; launch prices were $149 and $420. By overall MobileRank rating, the Redmi K90 Ultra leads — 73/100 vs 33/100 (a 40-point difference). Key differences: the Redmi K90 Ultra has the bigger battery (8550 mAh vs 5200); the main camera is 8 MP vs 50 MP; the Redmi K90 Ultra is faster in AnTuTu (3,119,308 vs 358,383).
Infinix Smart 20
Redmi K90 Ultra
- Cheaper at launch: $149 vs $420
- Better portability (68/100 vs 40/100)
- Higher AnTuTu: 3119308 vs 358383
- Better Geekbench Single: 3041 vs 432
- Better Geekbench Multi: 9494 vs 1416
- Bigger battery: 8550 vs 5200 mAh
- Faster charging: 100W vs 15W
- Better main camera: 50MP vs 8MP
- Higher refresh rate: 165Hz vs 120Hz
- Higher performance (92/100 vs 30/100)
- Better camera (37/100 vs 10/100)
- Longer battery life (78/100 vs 48/100)
- Better display (94/100 vs 55/100)
Comparing the Infinix Smart 20 vs the Redmi K90 Ultra, the Redmi K90 Ultra scores 40 points higher (73/100 vs 33/100). In the "performance" category, the Redmi K90 Ultra leads (92/100 vs 30/100). In the "camera" category, the Redmi K90 Ultra leads (37/100 vs 10/100). In the "battery" category, the Redmi K90 Ultra leads (78/100 vs 48/100). Value score: Infinix Smart 20 — 42/100, Redmi K90 Ultra — 82/100; it is biased by price level, so it should not be compared directly between devices at different prices. In the "performance" category, the Redmi K90 Ultra significantly outperforms the Infinix Smart 20 (92/100 vs 30/100). In the "display" category, the Redmi K90 Ultra significantly outperforms the Infinix Smart 20 (94/100 vs 55/100). In the "camera" category, the Redmi K90 Ultra notably outperforms the Infinix Smart 20 (37/100 vs 10/100). In the "battery" category, the Redmi K90 Ultra significantly outperforms the Infinix Smart 20 (78/100 vs 48/100). In the "portability" category, the Infinix Smart 20 notably outperforms the Redmi K90 Ultra (68/100 vs 40/100).
| Specification | Infinix Smart 20 | Redmi K90 Ultra | |
|---|---|---|---|
| Processor | MediaTek Helio G81 Ultimate | Qualcomm Snapdragon 8 Elite | |
| AnTuTu | 358383 | 3119308 | |
| Geekbench Single | 432 | 3041 | |
| Geekbench Multi | 1416 | 9494 | |
| Display | 6.8" IPS LCD | 6.8" AMOLED | |
| Resolution | 1576x720 | 1280x2772 | |
| Refresh rate | 120 Hz | 165 Hz | |
| Battery | 5200 mAh | 8550 mAh | |
| Charging | 15W | 100W | |
| Main camera | 8 MP | 50 MP | |
| Ultrawide | 0 MP | 8 MP | |
| Front camera | 8 MP | 20 MP | |
| RAM | 4GB | 12GB / 16GB | |
| Storage | 64GB / 128GB | 256GB / 512GB | |
| OS | Android 16 | Android 16 | |
| Brightness (peak) | 700 nits | 3500 nits | |
| NFC | yes | yes | |
| Protection | IP64 | IP68/IP69 | |
| Dimensions | 167.7×78.8×7.7 mm | 162.9×77.9×8.2 mm | |
| Weight | — | 227 g | |
| Launch price | $149 | $420 |
Infinix Smart 20
- Main: 8MP f/f/2.0
- Front: 8MP
Redmi K90 Ultra
- Main: 50MP f/1.7
- Ultrawide: 8MP
- Front: 20MP
Infinix Smart 20
- 6.8" IPS LCD
- Resolution: 1576x720
- Refresh rate: 120 Hz
Redmi K90 Ultra
- 6.8" AMOLED
- Resolution: 1280x2772
- Refresh rate: 165 Hz
Infinix Smart 20
- 5200 mAh
- Wired: 15W
- No wireless charging
Redmi K90 Ultra
- 8550 mAh
- Wired: 100W
- No wireless charging
We compared Infinix Smart 20 and Redmi K90 Ultra, covering their specs and all relevant benchmarks.
Redmi K90 Ultra leads Infinix Smart 20 by 88.5% in our overall performance rating.
Launch price difference: $271. Infinix Smart 20 was $271 cheaper at launch.
performance
In the "performance" category, the Redmi K90 Ultra significantly outperforms the Infinix Smart 20 (92/100 vs 30/100).
display
In the "display" category, the Redmi K90 Ultra significantly outperforms the Infinix Smart 20 (94/100 vs 55/100).
camera
In the "camera" category, the Redmi K90 Ultra notably outperforms the Infinix Smart 20 (37/100 vs 10/100).
battery
In the "battery" category, the Redmi K90 Ultra significantly outperforms the Infinix Smart 20 (78/100 vs 48/100).
portability
In the "portability" category, the Infinix Smart 20 notably outperforms the Redmi K90 Ultra (68/100 vs 40/100).
Which is better: the Infinix Smart 20 or the Redmi K90 Ultra?
The Redmi K90 Ultra significantly outperforms the Infinix Smart 20 by 40 points (73/100 vs 33/100).
What is the rating of the Infinix Smart 20 and the Redmi K90 Ultra?
The Infinix Smart 20 has a MobileRank rating of 33/100, the Redmi K90 Ultra — 73/100.
Which has the better camera: the Infinix Smart 20 or the Redmi K90 Ultra?
The Redmi K90 Ultra leads on camera score (37/100 vs 10/100).
Which is more powerful: the Infinix Smart 20 or the Redmi K90 Ultra?
The Redmi K90 Ultra leads on performance (92/100 vs 30/100).
Should you choose the Infinix Smart 20 over the Redmi K90 Ultra?
The Infinix Smart 20 is a better fit for everyday use. The Redmi K90 Ultra is a better fit for gamers and power users, those who care about battery life, budget-conscious buyers.