Infinix S4 vs Redmi K90
The Infinix S4 (2019) runs on the MediaTek Helio P22, while the Redmi K90 (2025) runs on the Qualcomm Snapdragon 8 Elite. By overall MobileRank rating, the Redmi K90 leads — 76/100 vs 23/100 (a 53-point difference). Key differences: the Redmi K90 has the bigger battery (7100 mAh vs 4000); the main camera is 13 MP vs 50 MP; the Redmi K90 is faster in AnTuTu (3,077,585 vs 177,554); the Redmi K90 has NFC for contactless payments, the Infinix S4 doesn't; the Infinix S4 is noticeably lighter (154g vs 206g).
Profile comparison
Category scores
Infinix S4
Redmi K90
What makes Infinix S4 better?
- Lighter: 154g vs 206g
- Better portability (84/100 vs 55/100)
What makes Redmi K90 better?
- Higher AnTuTu: 3077585 vs 177554
- Better Geekbench Single: 3013 vs 233
- Better Geekbench Multi: 9287 vs 723
- Bigger battery: 7100 vs 4000 mAh
- Better main camera: 50MP vs 13MP
- Higher performance (91/100 vs 10/100)
- Better camera (58/100 vs 18/100)
- Longer battery life (72/100 vs 32/100)
- Better display (82/100 vs 37/100)
Comparison verdict
Comparing the Infinix S4 vs the Redmi K90, the Redmi K90 scores 53 points higher (76/100 vs 23/100). In the "performance" category, the Redmi K90 leads (91/100 vs 10/100). In the "camera" category, the Redmi K90 leads (58/100 vs 18/100). In the "battery" category, the Redmi K90 leads (72/100 vs 32/100). In the "performance" category, the Redmi K90 significantly outperforms the Infinix S4 (91/100 vs 10/100). In the "display" category, the Redmi K90 significantly outperforms the Infinix S4 (82/100 vs 37/100). In the "camera" category, the Redmi K90 significantly outperforms the Infinix S4 (58/100 vs 18/100). In the "battery" category, the Redmi K90 significantly outperforms the Infinix S4 (72/100 vs 32/100). In the "portability" category, the Infinix S4 notably outperforms the Redmi K90 (84/100 vs 55/100).
Specs comparison
| Specification | Infinix S4 | Redmi K90 | |
|---|---|---|---|
| Processor | MediaTek Helio P22 | Qualcomm Snapdragon 8 Elite | |
| AnTuTu | 177554 | 3077585 | |
| Geekbench Single | 233 | 3013 | |
| Geekbench Multi | 723 | 9287 | |
| Display | 6.2" IPS LCD | 6.6" AMOLED | |
| Resolution | 720x1440 | 2510x1156 | |
| Refresh rate | — | 120 Hz | |
| Battery | 4000 mAh | 7100 mAh | |
| Charging | — | 100W | |
| Main camera | 13 MP | 50 MP | |
| Ultrawide | 0 MP | 8 MP | |
| Telephoto | 0 MP | 50 MP | |
| Front camera | 32 MP | 20 MP | |
| RAM | 3GB / 4GB | 12GB / 16GB | |
| Storage | 32GB / 64GB | 256GB / 512GB | |
| OS | Android 9.0 (Pie) | Android 16 | |
| Brightness (peak) | — | 3500 nits | |
| NFC | no | yes | |
| Protection | — | IP68 | |
| Dimensions | 156.0×75.0×7.9 mm | 157.5×75.3×8.0 mm | |
| Weight | 154 g | 206 g | |
| Launch price | — | $401 |
Camera comparison
Infinix S4
- Main: 13MP
- Front: 32MP
Redmi K90
- Main: 50MP f/1.9
- Ultrawide: 8MP
- Telephoto: 50MP
- Front: 20MP
Display comparison
Infinix S4
- 6.2" IPS LCD
- Resolution: 720x1440
- Refresh rate: —
Redmi K90
- 6.6" AMOLED
- Resolution: 2510x1156
- Refresh rate: 120 Hz
Battery and charging
Infinix S4
- 4000 mAh
- Wireless charging: no data
Redmi K90
- 7100 mAh
- Wired: 100W
- No wireless charging
Overall performance score
We compared Infinix S4 and Redmi K90, covering their specs and all relevant benchmarks.
Redmi K90 leads Infinix S4 by 94.2% in our overall performance rating.
Benchmarks
Launch prices and where to check today's
Infinix S4
Price unknownDetailed category analysis
performance
In the "performance" category, the Redmi K90 significantly outperforms the Infinix S4 (91/100 vs 10/100).
display
In the "display" category, the Redmi K90 significantly outperforms the Infinix S4 (82/100 vs 37/100).
camera
In the "camera" category, the Redmi K90 significantly outperforms the Infinix S4 (58/100 vs 18/100).
battery
In the "battery" category, the Redmi K90 significantly outperforms the Infinix S4 (72/100 vs 32/100).
portability
In the "portability" category, the Infinix S4 notably outperforms the Redmi K90 (84/100 vs 55/100).
Frequently asked questions
Which is better: the Infinix S4 or the Redmi K90?
The Redmi K90 significantly outperforms the Infinix S4 by 53 points (76/100 vs 23/100).
What is the rating of the Infinix S4 and the Redmi K90?
The Infinix S4 has a MobileRank rating of 23/100, the Redmi K90 — 76/100.
Which has the better camera: the Infinix S4 or the Redmi K90?
The Redmi K90 leads on camera score (58/100 vs 18/100).
Which is more powerful: the Infinix S4 or the Redmi K90?
The Redmi K90 leads on performance (91/100 vs 10/100).
Should you choose the Infinix S4 over the Redmi K90?
The Redmi K90 is a better fit for gamers and power users, budget-conscious buyers.