Redmi K90 Ultra vs Tecno Spark 40c
The Redmi K90 Ultra (2026) runs on the Qualcomm Snapdragon 8 Elite, while the Tecno Spark 40c (2025) runs on the Helio G81; launch prices were $420 and $102. By overall MobileRank rating, the Redmi K90 Ultra leads — 73/100 vs 33/100 (a 40-point difference). Key differences: the Redmi K90 Ultra has the bigger battery (8550 mAh vs 6000); the main camera is 50 MP vs 13 MP; the Redmi K90 Ultra is faster in AnTuTu (3,233,695 vs 358,608); the Redmi K90 Ultra has NFC for contactless payments, the Tecno Spark 40c doesn't.
Profile comparison
Category scores
Redmi K90 Ultra
Tecno Spark 40c
What makes Redmi K90 Ultra better?
- Higher AnTuTu: 3233695 vs 358608
- Better Geekbench Single: 3013 vs 432
- Better Geekbench Multi: 9287 vs 1416
- Bigger battery: 8550 vs 6000 mAh
- Faster charging: 100W vs 18W
- Better main camera: 50MP vs 13MP
- Higher refresh rate: 165Hz vs 120Hz
- Higher performance (92/100 vs 30/100)
- Better camera (37/100 vs 10/100)
- Longer battery life (78/100 vs 51/100)
- Better display (94/100 vs 55/100)
What makes Tecno Spark 40c better?
- Cheaper at launch: $102 vs $420
- Better portability (48/100 vs 40/100)
Comparison verdict
Comparing the Redmi K90 Ultra vs the Tecno Spark 40c, the Redmi K90 Ultra scores 40 points higher (73/100 vs 33/100). In the "performance" category, the Redmi K90 Ultra leads (92/100 vs 30/100). 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 51/100). Value score: Redmi K90 Ultra — 72/100, Tecno Spark 40c — 54/100; 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 Ultra significantly outperforms the Tecno Spark 40c (92/100 vs 30/100). In the "display" category, the Redmi K90 Ultra significantly outperforms the Tecno Spark 40c (94/100 vs 55/100). In the "camera" category, the Redmi K90 Ultra notably outperforms the Tecno Spark 40c (37/100 vs 10/100). In the "battery" category, the Redmi K90 Ultra notably outperforms the Tecno Spark 40c (78/100 vs 51/100). In the "portability" category, the Tecno Spark 40c is a bit better (48/100 vs 40/100).
Specs comparison
| Specification | Redmi K90 Ultra | Tecno Spark 40c | |
|---|---|---|---|
| Processor | Qualcomm Snapdragon 8 Elite | Helio G81 | |
| AnTuTu | 3233695 | 358608 | |
| Geekbench Single | 3013 | 432 | |
| Geekbench Multi | 9287 | 1416 | |
| Display | 6.8" AMOLED | 6.7" IPS LCD | |
| Resolution | 1280x2772 | 720x1600 | |
| Refresh rate | 165 Hz | 120 Hz | |
| Battery | 8550 mAh | 6000 mAh | |
| Charging | 100W | 18W | |
| Main camera | 50 MP | 13 MP | |
| Ultrawide | 8 MP | 0 MP | |
| Front camera | 20 MP | 8 MP | |
| RAM | 12GB / 16GB | 4GB / 6GB / 8GB | |
| Storage | 256GB / 512GB | 128GB / 256GB | |
| OS | Android 16 | Android 15 | |
| Brightness (peak) | 3500 nits | — | |
| NFC | yes | no | |
| Protection | IP68/IP69 | IP64 | |
| Dimensions | 162.9×77.9×8.2 mm | 165.6×77.0×8.4 mm | |
| Weight | 227 g | — | |
| Launch price | $420 | $102 |
Camera comparison
Redmi K90 Ultra
- Main: 50MP f/1.7
- Ultrawide: 8MP
- Front: 20MP
Tecno Spark 40c
- Main: 13MP f/1.8
- Front: 8MP
Display comparison
Redmi K90 Ultra
- 6.8" AMOLED
- Resolution: 1280x2772
- Refresh rate: 165 Hz
Tecno Spark 40c
- 6.7" IPS LCD
- Resolution: 720x1600
- Refresh rate: 120 Hz
Battery and charging
Redmi K90 Ultra
- 8550 mAh
- Wired: 100W
- No wireless charging
Tecno Spark 40c
- 6000 mAh
- Wired: 18W
- No wireless charging
Overall performance score
We compared Redmi K90 Ultra and Tecno Spark 40c, covering their specs and all relevant benchmarks.
Redmi K90 Ultra leads Tecno Spark 40c by 801.7% in our overall performance rating.
Benchmarks
Launch prices and where to check today's
Launch price difference: $318. Tecno Spark 40c was $318 cheaper at launch.
Detailed category analysis
performance
In the "performance" category, the Redmi K90 Ultra significantly outperforms the Tecno Spark 40c (92/100 vs 30/100).
display
In the "display" category, the Redmi K90 Ultra significantly outperforms the Tecno Spark 40c (94/100 vs 55/100).
camera
In the "camera" category, the Redmi K90 Ultra notably outperforms the Tecno Spark 40c (37/100 vs 10/100).
battery
In the "battery" category, the Redmi K90 Ultra notably outperforms the Tecno Spark 40c (78/100 vs 51/100).
portability
In the "portability" category, the Tecno Spark 40c is a bit better (48/100 vs 40/100).
Frequently asked questions
Which is better: the Redmi K90 Ultra or the Tecno Spark 40c?
The Redmi K90 Ultra significantly outperforms the Tecno Spark 40c by 40 points (73/100 vs 33/100).
What is the rating of the Redmi K90 Ultra and the Tecno Spark 40c?
The Redmi K90 Ultra has a MobileRank rating of 73/100, the Tecno Spark 40c — 33/100.
Which has the better camera: the Redmi K90 Ultra or the Tecno Spark 40c?
The Redmi K90 Ultra leads on camera score (37/100 vs 10/100).
Which is more powerful: the Redmi K90 Ultra or the Tecno Spark 40c?
The Redmi K90 Ultra leads on performance (92/100 vs 30/100).
Should you choose the Redmi K90 Ultra over the Tecno Spark 40c?
The Redmi K90 Ultra is a better fit for gamers and power users, those who care about battery life.