Redmi K90 Ultra vs Vivo Y81i
The Redmi K90 Ultra (2026) runs on the Qualcomm Snapdragon 8 Elite, while the Vivo Y81i (2018) runs on the MediaTek Helio A22. By overall MobileRank rating, the Redmi K90 Ultra leads — 73/100 vs 18/100 (a 55-point difference). Key differences: the Redmi K90 Ultra has the bigger battery (8550 mAh vs 3260); the main camera is 50 MP vs 13 MP; the Redmi K90 Ultra is faster in AnTuTu (3,233,695 vs 155,362); the Redmi K90 Ultra has NFC for contactless payments, the Vivo Y81i doesn't; the Vivo Y81i is noticeably lighter (143g vs 227g).
Profile comparison
Category scores
Redmi K90 Ultra
Vivo Y81i
What makes Redmi K90 Ultra better?
- Higher AnTuTu: 3233695 vs 155362
- Better Geekbench Single: 3013 vs 300
- Better Geekbench Multi: 9287 vs 486
- Bigger battery: 8550 vs 3260 mAh
- Better main camera: 50MP vs 13MP
- Higher performance (92/100 vs 10/100)
- Better camera (37/100 vs 10/100)
- Longer battery life (78/100 vs 15/100)
- Better display (94/100 vs 39/100)
What makes Vivo Y81i better?
- Lighter: 143g vs 227g
- Better portability (85/100 vs 40/100)
Comparison verdict
Comparing the Redmi K90 Ultra vs the Vivo Y81i, the Redmi K90 Ultra scores 55 points higher (73/100 vs 18/100). In the "performance" category, the Redmi K90 Ultra leads (92/100 vs 10/100). 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 15/100). In the "performance" category, the Redmi K90 Ultra significantly outperforms the Vivo Y81i (92/100 vs 10/100). In the "display" category, the Redmi K90 Ultra significantly outperforms the Vivo Y81i (94/100 vs 39/100). In the "camera" category, the Redmi K90 Ultra notably outperforms the Vivo Y81i (37/100 vs 10/100). In the "battery" category, the Redmi K90 Ultra significantly outperforms the Vivo Y81i (78/100 vs 15/100). In the "portability" category, the Vivo Y81i significantly outperforms the Redmi K90 Ultra (85/100 vs 40/100).
Specs comparison
| Specification | Redmi K90 Ultra | Vivo Y81i | |
|---|---|---|---|
| Processor | Qualcomm Snapdragon 8 Elite | MediaTek Helio A22 | |
| AnTuTu | 3233695 | 155362 | |
| Geekbench Single | 3013 | 300 | |
| Geekbench Multi | 9287 | 486 | |
| Display | 6.8" AMOLED | 6.2" IPS LCD | |
| Resolution | 1280x2772 | 720x1520 | |
| Refresh rate | 165 Hz | — | |
| Battery | 8550 mAh | 3260 mAh | |
| Charging | 100W | — | |
| Main camera | 50 MP | 13 MP | |
| Ultrawide | 8 MP | 0 MP | |
| Front camera | 20 MP | 5 MP | |
| RAM | 12GB / 16GB | 2GB | |
| Storage | 256GB / 512GB | 16GB | |
| OS | Android 16 | Android 8.1 (Oreo); Funtouch 4 | |
| Brightness (peak) | 3500 nits | — | |
| NFC | yes | no | |
| Protection | IP68/IP69 | — | |
| Dimensions | 162.9×77.9×8.2 mm | 155.1×75.0×7.8 mm | |
| Weight | 227 g | 143 g | |
| Launch price | $420 | — |
Camera comparison
Redmi K90 Ultra
- Main: 50MP f/1.7
- Ultrawide: 8MP
- Front: 20MP
Vivo Y81i
- Main: 13MP f/2.2
- Front: 5MP
Display comparison
Redmi K90 Ultra
- 6.8" AMOLED
- Resolution: 1280x2772
- Refresh rate: 165 Hz
Vivo Y81i
- 6.2" IPS LCD
- Resolution: 720x1520
- Refresh rate: —
Battery and charging
Redmi K90 Ultra
- 8550 mAh
- Wired: 100W
- No wireless charging
Vivo Y81i
- 3260 mAh
- Wireless charging: no data
Overall performance score
We compared Redmi K90 Ultra and Vivo Y81i, covering their specs and all relevant benchmarks.
Redmi K90 Ultra leads Vivo Y81i by 1981.4% in our overall performance rating.
Benchmarks
Launch prices and where to check today's
Vivo Y81i
Price unknownDetailed category analysis
performance
In the "performance" category, the Redmi K90 Ultra significantly outperforms the Vivo Y81i (92/100 vs 10/100).
display
In the "display" category, the Redmi K90 Ultra significantly outperforms the Vivo Y81i (94/100 vs 39/100).
camera
In the "camera" category, the Redmi K90 Ultra notably outperforms the Vivo Y81i (37/100 vs 10/100).
battery
In the "battery" category, the Redmi K90 Ultra significantly outperforms the Vivo Y81i (78/100 vs 15/100).
portability
In the "portability" category, the Vivo Y81i significantly outperforms the Redmi K90 Ultra (85/100 vs 40/100).
Frequently asked questions
Which is better: the Redmi K90 Ultra or the Vivo Y81i?
The Redmi K90 Ultra significantly outperforms the Vivo Y81i by 55 points (73/100 vs 18/100).
What is the rating of the Redmi K90 Ultra and the Vivo Y81i?
The Redmi K90 Ultra has a MobileRank rating of 73/100, the Vivo Y81i — 18/100.
Which has the better camera: the Redmi K90 Ultra or the Vivo Y81i?
The Redmi K90 Ultra leads on camera score (37/100 vs 10/100).
Which is more powerful: the Redmi K90 Ultra or the Vivo Y81i?
The Redmi K90 Ultra leads on performance (92/100 vs 10/100).
Should you choose the Redmi K90 Ultra over the Vivo Y81i?
The Redmi K90 Ultra is a better fit for gamers and power users, those who care about battery life.