Redmi K90 Ultra vs Vivo Y400 4G
The Redmi K90 Ultra (2026) runs on the Qualcomm Snapdragon 8 Elite, while the Vivo Y400 4G (2025) runs on the Qualcomm Snapdragon 685. By overall MobileRank rating, the Redmi K90 Ultra leads — 73/100 vs 44/100 (a 29-point difference). Key differences: the Redmi K90 Ultra has the bigger battery (8550 mAh vs 6000); the Redmi K90 Ultra is faster in AnTuTu (3,119,308 vs 467,392); the Vivo Y400 4G is noticeably lighter (196g vs 227g).
Redmi K90 Ultra
Vivo Y400 4G
- Higher AnTuTu: 3119308 vs 467392
- Better Geekbench Single: 3041 vs 466
- Better Geekbench Multi: 9494 vs 1396
- Bigger battery: 8550 vs 6000 mAh
- Faster charging: 100W vs 44W
- Higher refresh rate: 165Hz vs 120Hz
- Higher performance (92/100 vs 33/100)
- Better camera (37/100 vs 30/100)
- Longer battery life (78/100 vs 56/100)
- Better display (94/100 vs 79/100)
- Lighter: 196g vs 227g
- Better portability (63/100 vs 40/100)
Comparing the Redmi K90 Ultra vs the Vivo Y400 4G, the Redmi K90 Ultra scores 29 points higher (73/100 vs 44/100). In the "performance" category, the Redmi K90 Ultra leads (92/100 vs 33/100). In the "battery" category, the Redmi K90 Ultra leads (78/100 vs 56/100). In the "performance" category, the Redmi K90 Ultra significantly outperforms the Vivo Y400 4G (92/100 vs 33/100). In the "display" category, the Redmi K90 Ultra notably outperforms the Vivo Y400 4G (94/100 vs 79/100). In the "camera" category, the Redmi K90 Ultra is a bit better (37/100 vs 30/100). In the "battery" category, the Redmi K90 Ultra notably outperforms the Vivo Y400 4G (78/100 vs 56/100). In the "portability" category, the Vivo Y400 4G notably outperforms the Redmi K90 Ultra (63/100 vs 40/100).
| Specification | Redmi K90 Ultra | Vivo Y400 4G | |
|---|---|---|---|
| Processor | Qualcomm Snapdragon 8 Elite | Qualcomm Snapdragon 685 | |
| AnTuTu | 3119308 | 467392 | |
| Geekbench Single | 3041 | 466 | |
| Geekbench Multi | 9494 | 1396 | |
| Display | 6.8" AMOLED | 6.7" AMOLED | |
| Resolution | 1280x2772 | 1080x2400 | |
| Refresh rate | 165 Hz | 120 Hz | |
| Battery | 8550 mAh | 6000 mAh | |
| Charging | 100W | 44W | |
| Main camera | 50 MP | 50 MP | |
| Ultrawide | 8 MP | 0 MP | |
| Front camera | 20 MP | 8 MP | |
| RAM | 12GB / 16GB | 8GB | |
| Storage | 256GB / 512GB | 128GB / 256GB | |
| OS | Android 16 | Android 15, Funtouch 15 | |
| Brightness (peak) | 3500 nits | 1800 nits | |
| NFC | yes | yes | |
| Protection | IP68/IP69 | IP68 | |
| Dimensions | 162.9×77.9×8.2 mm | 162.3×75.3×7.9 mm | |
| Weight | 227 g | 196 g | |
| Launch price | $420 | — |
Redmi K90 Ultra
- Main: 50MP f/1.7
- Ultrawide: 8MP
- Front: 20MP
Vivo Y400 4G
- Main: 50MP f/f/1.8
- Front: 8MP
Redmi K90 Ultra
- 6.8" AMOLED
- Resolution: 1280x2772
- Refresh rate: 165 Hz
Vivo Y400 4G
- 6.7" AMOLED
- Resolution: 1080x2400
- Refresh rate: 120 Hz
Redmi K90 Ultra
- 8550 mAh
- Wired: 100W
- No wireless charging
Vivo Y400 4G
- 6000 mAh
- Wired: 44W
- No wireless charging
We compared Redmi K90 Ultra and Vivo Y400 4G, covering their specs and all relevant benchmarks.
Redmi K90 Ultra leads Vivo Y400 4G by 567.4% in our overall performance rating.
Vivo Y400 4G
Price unknownperformance
In the "performance" category, the Redmi K90 Ultra significantly outperforms the Vivo Y400 4G (92/100 vs 33/100).
display
In the "display" category, the Redmi K90 Ultra notably outperforms the Vivo Y400 4G (94/100 vs 79/100).
camera
In the "camera" category, the Redmi K90 Ultra is a bit better (37/100 vs 30/100).
battery
In the "battery" category, the Redmi K90 Ultra notably outperforms the Vivo Y400 4G (78/100 vs 56/100).
portability
In the "portability" category, the Vivo Y400 4G notably outperforms the Redmi K90 Ultra (63/100 vs 40/100).
Which is better: the Redmi K90 Ultra or the Vivo Y400 4G?
The Redmi K90 Ultra significantly outperforms the Vivo Y400 4G by 29 points (73/100 vs 44/100).
What is the rating of the Redmi K90 Ultra and the Vivo Y400 4G?
The Redmi K90 Ultra has a MobileRank rating of 73/100, the Vivo Y400 4G — 44/100.
Which has the better camera: the Redmi K90 Ultra or the Vivo Y400 4G?
The Redmi K90 Ultra leads on camera score (37/100 vs 30/100).
Which is more powerful: the Redmi K90 Ultra or the Vivo Y400 4G?
The Redmi K90 Ultra leads on performance (92/100 vs 33/100).
Should you choose the Redmi K90 Ultra over the Vivo Y400 4G?
The Redmi K90 Ultra is a better fit for gamers and power users, those who care about battery life, budget-conscious buyers. The Vivo Y400 4G is a better fit for everyday use.