Redmi 4 Prime vs Redmi K90 Ultra
The Redmi 4 Prime (2016) runs on the Qualcomm Snapdragon 625, while the Redmi K90 Ultra (2026) runs on the Qualcomm Snapdragon 8 Elite; launch prices were $150 and $420. By overall MobileRank rating, the Redmi K90 Ultra leads — 73/100 vs 22/100 (a 51-point difference). Key differences: the Redmi K90 Ultra has the bigger battery (8550 mAh vs 4100); the main camera is 13 MP vs 50 MP; the Redmi K90 Ultra is faster in AnTuTu (3,119,308 vs 218,879); the Redmi K90 Ultra has NFC for contactless payments, the Redmi 4 Prime doesn't; the Redmi 4 Prime is noticeably lighter (156g vs 227g).
Redmi 4 Prime
Redmi K90 Ultra
- Lighter: 156g vs 227g
- Cheaper at launch: $150 vs $420
- Better portability (74/100 vs 40/100)
- Higher AnTuTu: 3119308 vs 218879
- Better Geekbench Single: 3041 vs 189
- Better Geekbench Multi: 9494 vs 862
- Bigger battery: 8550 vs 4100 mAh
- Better main camera: 50MP vs 13MP
- Higher refresh rate: 165Hz vs 60Hz
- Higher performance (92/100 vs 14/100)
- Better camera (37/100 vs 10/100)
- Longer battery life (78/100 vs 35/100)
- Better display (94/100 vs 32/100)
Comparing the Redmi 4 Prime vs the Redmi K90 Ultra, the Redmi K90 Ultra scores 51 points higher (73/100 vs 22/100). In the "performance" category, the Redmi K90 Ultra leads (92/100 vs 14/100). 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 35/100). Value score: Redmi 4 Prime — 20/100, 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 Redmi 4 Prime (92/100 vs 14/100). In the "display" category, the Redmi K90 Ultra significantly outperforms the Redmi 4 Prime (94/100 vs 32/100). In the "camera" category, the Redmi K90 Ultra notably outperforms the Redmi 4 Prime (37/100 vs 10/100). In the "battery" category, the Redmi K90 Ultra significantly outperforms the Redmi 4 Prime (78/100 vs 35/100). In the "portability" category, the Redmi 4 Prime significantly outperforms the Redmi K90 Ultra (74/100 vs 40/100).
| Specification | Redmi 4 Prime | Redmi K90 Ultra | |
|---|---|---|---|
| Processor | Qualcomm Snapdragon 625 | Qualcomm Snapdragon 8 Elite | |
| AnTuTu | 218879 | 3119308 | |
| Geekbench Single | 189 | 3041 | |
| Geekbench Multi | 862 | 9494 | |
| Display | 5.0" IPS LCD | 6.8" AMOLED | |
| Resolution | — | 1280x2772 | |
| Refresh rate | 60 Hz | 165 Hz | |
| Battery | 4100 mAh | 8550 mAh | |
| Charging | — | 100W | |
| Main camera | 13 MP | 50 MP | |
| Ultrawide | 0 MP | 8 MP | |
| Front camera | 5 MP | 20 MP | |
| RAM | 3GB | 12GB / 16GB | |
| Storage | 32GB | 256GB / 512GB | |
| OS | — | Android 16 | |
| Brightness (peak) | — | 3500 nits | |
| NFC | no | yes | |
| Protection | — | IP68/IP69 | |
| Dimensions | 141.3×69.6×8.9 mm | 162.9×77.9×8.2 mm | |
| Weight | 156 g | 227 g | |
| Launch price | $150 | $420 |
Redmi 4 Prime
- Main: 13MP
- Front: 5MP
Redmi K90 Ultra
- Main: 50MP f/1.7
- Ultrawide: 8MP
- Front: 20MP
Redmi 4 Prime
- 5.0" IPS LCD
- Refresh rate: 60 Hz
Redmi K90 Ultra
- 6.8" AMOLED
- Resolution: 1280x2772
- Refresh rate: 165 Hz
Redmi 4 Prime
- 4100 mAh
- Wireless charging: no data
Redmi K90 Ultra
- 8550 mAh
- Wired: 100W
- No wireless charging
We compared Redmi 4 Prime and Redmi K90 Ultra, covering their specs and all relevant benchmarks.
Redmi K90 Ultra leads Redmi 4 Prime by 93.0% in our overall performance rating.
Launch price difference: $270. Redmi 4 Prime was $270 cheaper at launch.
performance
In the "performance" category, the Redmi K90 Ultra significantly outperforms the Redmi 4 Prime (92/100 vs 14/100).
display
In the "display" category, the Redmi K90 Ultra significantly outperforms the Redmi 4 Prime (94/100 vs 32/100).
camera
In the "camera" category, the Redmi K90 Ultra notably outperforms the Redmi 4 Prime (37/100 vs 10/100).
battery
In the "battery" category, the Redmi K90 Ultra significantly outperforms the Redmi 4 Prime (78/100 vs 35/100).
portability
In the "portability" category, the Redmi 4 Prime significantly outperforms the Redmi K90 Ultra (74/100 vs 40/100).
Which is better: the Redmi 4 Prime or the Redmi K90 Ultra?
The Redmi K90 Ultra significantly outperforms the Redmi 4 Prime by 51 points (73/100 vs 22/100).
What is the rating of the Redmi 4 Prime and the Redmi K90 Ultra?
The Redmi 4 Prime has a MobileRank rating of 22/100, the Redmi K90 Ultra — 73/100.
Which has the better camera: the Redmi 4 Prime or the Redmi K90 Ultra?
The Redmi K90 Ultra leads on camera score (37/100 vs 10/100).
Which is more powerful: the Redmi 4 Prime or the Redmi K90 Ultra?
The Redmi K90 Ultra leads on performance (92/100 vs 14/100).
Should you choose the Redmi 4 Prime over the Redmi K90 Ultra?
The Redmi 4 Prime 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.