Redmi K90 Max vs Vivo Y51
The Redmi K90 Max (2026) runs on the MediaTek Dimensity 9500, while the Vivo Y51 (2020) runs on the Qualcomm Snapdragon 665. By overall MobileRank rating, the Redmi K90 Max leads — 75/100 vs 40/100 (a 35-point difference). Key differences: the Redmi K90 Max has the bigger battery (8550 mAh vs 5000); the main camera is 50 MP vs 48 MP; the Redmi K90 Max is faster in AnTuTu (3,760,662 vs 329,457); the Redmi K90 Max has NFC for contactless payments, the Vivo Y51 doesn't; the Vivo Y51 is noticeably lighter (186g vs 227g).
Profile comparison
Category scores
Redmi K90 Max
Vivo Y51
What makes Redmi K90 Max better?
- Higher AnTuTu: 3760662 vs 329457
- Better Geekbench Single: 3293 vs 321
- Better Geekbench Multi: 10243 vs 1128
- Bigger battery: 8550 vs 5000 mAh
- Faster charging: 100W vs 18W
- Better main camera: 50MP vs 48MP
- Higher performance (96/100 vs 24/100)
- Better camera (37/100 vs 34/100)
- Longer battery life (78/100 vs 43/100)
- Better display (94/100 vs 83/100)
What makes Vivo Y51 better?
- Lighter: 186g vs 227g
- Better portability (59/100 vs 41/100)
Comparison verdict
Comparing the Redmi K90 Max vs the Vivo Y51, the Redmi K90 Max scores 35 points higher (75/100 vs 40/100). In the "performance" category, the Redmi K90 Max leads (96/100 vs 24/100). In the "battery" category, the Redmi K90 Max leads (78/100 vs 43/100). In the "performance" category, the Redmi K90 Max significantly outperforms the Vivo Y51 (96/100 vs 24/100). In the "display" category, the Redmi K90 Max is a bit better (94/100 vs 83/100). In the "camera" category, the Redmi K90 Max and the Vivo Y51 are nearly equal (37/100 vs 34/100). In the "battery" category, the Redmi K90 Max significantly outperforms the Vivo Y51 (78/100 vs 43/100). In the "portability" category, the Vivo Y51 notably outperforms the Redmi K90 Max (59/100 vs 41/100).
Specs comparison
| Specification | Redmi K90 Max | Vivo Y51 | |
|---|---|---|---|
| Processor | MediaTek Dimensity 9500 | Qualcomm Snapdragon 665 | |
| AnTuTu | 3760662 | 329457 | |
| Geekbench Single | 3293 | 321 | |
| Geekbench Multi | 10243 | 1128 | |
| Display | 6.8" AMOLED | 6.4" Super AMOLED | |
| Resolution | 2772x1280 | 1080x2340 | |
| Refresh rate | 165 Hz | — | |
| Battery | 8550 mAh | 5000 mAh | |
| Charging | 100W | 18W | |
| Main camera | 50 MP | 48 MP | |
| Ultrawide | 8 MP | 8 MP | |
| Front camera | 20 MP | 16 MP | |
| RAM | 12GB / 16GB | 8GB | |
| Storage | 256GB / 512GB / 1TB | 128GB | |
| OS | Android 16 | Android 10, Funtouch 10 | |
| Brightness (peak) | 3500 nits | — | |
| NFC | yes | no | |
| Protection | IP66 | — | |
| Dimensions | 162.9×77.9×8.1 mm | 159.3×75.2×8.7 mm | |
| Weight | 227 g | 186 g | |
| Launch price | $504 | — |
Camera comparison
Redmi K90 Max
- Main: 50MP f/1.68
- Ultrawide: 8MP
- Front: 20MP
Vivo Y51
- Main: 48MP f/1.8
- Ultrawide: 8MP
- Front: 16MP
Display comparison
Redmi K90 Max
- 6.8" AMOLED
- Resolution: 2772x1280
- Refresh rate: 165 Hz
Vivo Y51
- 6.4" Super AMOLED
- Resolution: 1080x2340
- Refresh rate: —
Battery and charging
Redmi K90 Max
- 8550 mAh
- Wired: 100W
- No wireless charging
Vivo Y51
- 5000 mAh
- Wired: 18W
- No wireless charging
Overall performance score
We compared Redmi K90 Max and Vivo Y51, covering their specs and all relevant benchmarks.
Redmi K90 Max leads Vivo Y51 by 1041.5% in our overall performance rating.
Benchmarks
Launch prices and where to check today's
Vivo Y51
Price unknownDetailed category analysis
performance
In the "performance" category, the Redmi K90 Max significantly outperforms the Vivo Y51 (96/100 vs 24/100).
display
In the "display" category, the Redmi K90 Max is a bit better (94/100 vs 83/100).
camera
In the "camera" category, the Redmi K90 Max and the Vivo Y51 are nearly equal (37/100 vs 34/100).
battery
In the "battery" category, the Redmi K90 Max significantly outperforms the Vivo Y51 (78/100 vs 43/100).
portability
In the "portability" category, the Vivo Y51 notably outperforms the Redmi K90 Max (59/100 vs 41/100).
Frequently asked questions
Which is better: the Redmi K90 Max or the Vivo Y51?
The Redmi K90 Max significantly outperforms the Vivo Y51 by 35 points (75/100 vs 40/100).
What is the rating of the Redmi K90 Max and the Vivo Y51?
The Redmi K90 Max has a MobileRank rating of 75/100, the Vivo Y51 — 40/100.
Which is more powerful: the Redmi K90 Max or the Vivo Y51?
The Redmi K90 Max leads on performance (96/100 vs 24/100).
Should you choose the Redmi K90 Max over the Vivo Y51?
The Redmi K90 Max is a better fit for gamers and power users, those who care about battery life.