Lava Smart 4 vs Redmi K90
The Lava Smart 4 (2026) runs on the Unisoc SC9863A, while the Redmi K90 (2025) runs on the Qualcomm Snapdragon 8 Elite; launch prices were $69 and $401. By overall MobileRank rating, the Redmi K90 leads — 76/100 vs 20/100 (a 56-point difference). Key differences: the Redmi K90 has the bigger battery (7100 mAh vs 5000); the main camera is 8 MP vs 50 MP; the Redmi K90 is faster in AnTuTu (3,077,585 vs 153,667); the Redmi K90 has NFC for contactless payments, the Lava Smart 4 doesn't.
Profile comparison
Category scores
Lava Smart 4
Redmi K90
What makes Lava Smart 4 better?
- Lighter: 197g vs 206g
- Cheaper at launch: $69 vs $401
- Overall rating 20/100
What makes Redmi K90 better?
- Higher AnTuTu: 3077585 vs 153667
- Better Geekbench Single: 3013 vs 205
- Better Geekbench Multi: 9287 vs 846
- Bigger battery: 7100 vs 5000 mAh
- Faster charging: 100W vs 10W
- Better main camera: 50MP vs 8MP
- Higher refresh rate: 120Hz vs 60Hz
- Higher performance (91/100 vs 9/100)
- Better camera (58/100 vs 10/100)
- Longer battery life (72/100 vs 43/100)
- Better display (82/100 vs 31/100)
- Better portability (55/100 vs 52/100)
Comparison verdict
Comparing the Lava Smart 4 vs the Redmi K90, the Redmi K90 scores 56 points higher (76/100 vs 20/100). In the "performance" category, the Redmi K90 leads (91/100 vs 9/100). In the "camera" category, the Redmi K90 leads (58/100 vs 10/100). In the "battery" category, the Redmi K90 leads (72/100 vs 43/100). Value score: Lava Smart 4 — 36/100, Redmi K90 — 80/100; it shows how far a model sits above or below the usual level for its price, and is not part of the overall rating. In the "performance" category, the Redmi K90 significantly outperforms the Lava Smart 4 (91/100 vs 9/100). In the "display" category, the Redmi K90 significantly outperforms the Lava Smart 4 (82/100 vs 31/100). In the "camera" category, the Redmi K90 significantly outperforms the Lava Smart 4 (58/100 vs 10/100). In the "battery" category, the Redmi K90 notably outperforms the Lava Smart 4 (72/100 vs 43/100). In the "portability" category, the Redmi K90 and the Lava Smart 4 are nearly equal (55/100 vs 52/100).
Specs comparison
| Specification | Lava Smart 4 | Redmi K90 | |
|---|---|---|---|
| Processor | Unisoc SC9863A | Qualcomm Snapdragon 8 Elite | |
| AnTuTu | 153667 | 3077585 | |
| Geekbench Single | 205 | 3013 | |
| Geekbench Multi | 846 | 9287 | |
| Display | 6.6" TFT LCD | 6.6" AMOLED | |
| Resolution | 540x1210 | 2510x1156 | |
| Refresh rate | 60 Hz | 120 Hz | |
| Battery | 5000 mAh | 7100 mAh | |
| Charging | 10W | 100W | |
| Main camera | 8 MP | 50 MP | |
| Ultrawide | 0 MP | 8 MP | |
| Telephoto | 0 MP | 50 MP | |
| Front camera | 5 MP | 20 MP | |
| RAM | 3GB | 12GB / 16GB | |
| Storage | 32GB | 256GB / 512GB | |
| OS | Android 16 Go | Android 16 | |
| Brightness (peak) | — | 3500 nits | |
| NFC | no | yes | |
| Protection | — | IP68 | |
| Dimensions | 165.0×76.5×8.8 mm | 157.5×75.3×8.0 mm | |
| Weight | 197 g | 206 g | |
| Launch price | $69 | $401 |
Camera comparison
Lava Smart 4
- Main: 8MP
- Front: 5MP
Redmi K90
- Main: 50MP f/1.9
- Ultrawide: 8MP
- Telephoto: 50MP
- Front: 20MP
Display comparison
Lava Smart 4
- 6.6" TFT LCD
- Resolution: 540x1210
- Refresh rate: 60 Hz
Redmi K90
- 6.6" AMOLED
- Resolution: 2510x1156
- Refresh rate: 120 Hz
Battery and charging
Lava Smart 4
- 5000 mAh
- Wired: 10W
- No wireless charging
Redmi K90
- 7100 mAh
- Wired: 100W
- No wireless charging
Overall performance score
We compared Lava Smart 4 and Redmi K90, covering their specs and all relevant benchmarks.
Redmi K90 leads Lava Smart 4 by 95.0% in our overall performance rating.
Benchmarks
Launch prices and where to check today's
Launch price difference: $332. Lava Smart 4 was $332 cheaper at launch.
Detailed category analysis
performance
In the "performance" category, the Redmi K90 significantly outperforms the Lava Smart 4 (91/100 vs 9/100).
display
In the "display" category, the Redmi K90 significantly outperforms the Lava Smart 4 (82/100 vs 31/100).
camera
In the "camera" category, the Redmi K90 significantly outperforms the Lava Smart 4 (58/100 vs 10/100).
battery
In the "battery" category, the Redmi K90 notably outperforms the Lava Smart 4 (72/100 vs 43/100).
portability
In the "portability" category, the Redmi K90 and the Lava Smart 4 are nearly equal (55/100 vs 52/100).
Frequently asked questions
Which is better: the Lava Smart 4 or the Redmi K90?
The Redmi K90 significantly outperforms the Lava Smart 4 by 56 points (76/100 vs 20/100).
What is the rating of the Lava Smart 4 and the Redmi K90?
The Lava Smart 4 has a MobileRank rating of 20/100, the Redmi K90 — 76/100.
Which has the better camera: the Lava Smart 4 or the Redmi K90?
The Redmi K90 leads on camera score (58/100 vs 10/100).
Which is more powerful: the Lava Smart 4 or the Redmi K90?
The Redmi K90 leads on performance (91/100 vs 9/100).
Should you choose the Lava Smart 4 over the Redmi K90?
The Redmi K90 is a better fit for gamers and power users, budget-conscious buyers.