Redmi K100 vs Vivo Y81i
The Redmi K100 (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 K100 leads — 73/100 vs 18/100 (a 55-point difference). Key differences: the Redmi K100 has the bigger battery (10000 mAh vs 3260); the main camera is 50 MP vs 13 MP; the Redmi K100 is faster in AnTuTu (3,298,726 vs 155,362); the Redmi K100 has NFC for contactless payments, the Vivo Y81i doesn't; the Vivo Y81i is noticeably lighter (143g vs 234g).
Profile comparison
Category scores
Redmi K100
Vivo Y81i
What makes Redmi K100 better?
- Higher AnTuTu: 3298726 vs 155362
- Better Geekbench Single: 3013 vs 300
- Better Geekbench Multi: 9287 vs 486
- Bigger battery: 10000 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 (80/100 vs 15/100)
- Better display (94/100 vs 39/100)
What makes Vivo Y81i better?
- Lighter: 143g vs 234g
- Better portability (85/100 vs 25/100)
Comparison verdict
Comparing the Redmi K100 vs the Vivo Y81i, the Redmi K100 scores 55 points higher (73/100 vs 18/100). In the "performance" category, the Redmi K100 leads (92/100 vs 10/100). In the "camera" category, the Redmi K100 leads (37/100 vs 10/100). In the "battery" category, the Redmi K100 leads (80/100 vs 15/100). In the "performance" category, the Redmi K100 significantly outperforms the Vivo Y81i (92/100 vs 10/100). In the "display" category, the Redmi K100 significantly outperforms the Vivo Y81i (94/100 vs 39/100). In the "camera" category, the Redmi K100 notably outperforms the Vivo Y81i (37/100 vs 10/100). In the "battery" category, the Redmi K100 significantly outperforms the Vivo Y81i (80/100 vs 15/100). In the "portability" category, the Vivo Y81i significantly outperforms the Redmi K100 (85/100 vs 25/100).
Specs comparison
| Specification | Redmi K100 | Vivo Y81i | |
|---|---|---|---|
| Processor | Qualcomm Snapdragon 8 Elite | MediaTek Helio A22 | |
| AnTuTu | 3298726 | 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 | 10000 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 17 | Android 8.1 (Oreo); Funtouch 4 | |
| Brightness (peak) | 3500 nits | — | |
| NFC | yes | no | |
| Protection | IP68 | — | |
| Dimensions | — | 155.1×75.0×7.8 mm | |
| Weight | 234 g | 143 g | |
| Launch price | — | — |
Camera comparison
Redmi K100
- Main: 50MP f/1.7
- Ultrawide: 8MP
- Front: 20MP
Vivo Y81i
- Main: 13MP f/2.2
- Front: 5MP
Display comparison
Redmi K100
- 6.8" AMOLED
- Resolution: 1280x2772
- Refresh rate: 165 Hz
Vivo Y81i
- 6.2" IPS LCD
- Resolution: 720x1520
- Refresh rate: —
Battery and charging
Redmi K100
- 10000 mAh
- Wired: 100W
- No wireless charging
Vivo Y81i
- 3260 mAh
- Wireless charging: no data
Overall performance score
We compared Redmi K100 and Vivo Y81i, covering their specs and all relevant benchmarks.
Redmi K100 leads Vivo Y81i by 2023.3% in our overall performance rating.
Benchmarks
Detailed category analysis
performance
In the "performance" category, the Redmi K100 significantly outperforms the Vivo Y81i (92/100 vs 10/100).
display
In the "display" category, the Redmi K100 significantly outperforms the Vivo Y81i (94/100 vs 39/100).
camera
In the "camera" category, the Redmi K100 notably outperforms the Vivo Y81i (37/100 vs 10/100).
battery
In the "battery" category, the Redmi K100 significantly outperforms the Vivo Y81i (80/100 vs 15/100).
portability
In the "portability" category, the Vivo Y81i significantly outperforms the Redmi K100 (85/100 vs 25/100).
Frequently asked questions
Which is better: the Redmi K100 or the Vivo Y81i?
The Redmi K100 significantly outperforms the Vivo Y81i by 55 points (73/100 vs 18/100).
What is the rating of the Redmi K100 and the Vivo Y81i?
The Redmi K100 has a MobileRank rating of 73/100, the Vivo Y81i — 18/100.
Which has the better camera: the Redmi K100 or the Vivo Y81i?
The Redmi K100 leads on camera score (37/100 vs 10/100).
Which is more powerful: the Redmi K100 or the Vivo Y81i?
The Redmi K100 leads on performance (92/100 vs 10/100).
Should you choose the Redmi K100 over the Vivo Y81i?
The Redmi K100 is a better fit for gamers and power users, those who care about battery life.