Realme C83 5G vs Redmi K90 Ultra
The Realme C83 5G (2026) runs on the MediaTek Dimensity 6400, while the Redmi K90 Ultra (2026) runs on the Qualcomm Snapdragon 8 Elite; launch prices were $130 and $420. By overall MobileRank rating, the Redmi K90 Ultra leads — 73/100 vs 47/100 (a 26-point difference). Key differences: the Redmi K90 Ultra has the bigger battery (8550 mAh vs 6000); the Redmi K90 Ultra is faster in AnTuTu (3,233,695 vs 581,041); the Realme C83 5G is noticeably lighter (198g vs 227g).
Profile comparison
Category scores
Realme C83 5G
Redmi K90 Ultra
What makes Realme C83 5G better?
- Lighter: 198g vs 227g
- Cheaper at launch: $130 vs $420
- Better portability (61/100 vs 40/100)
What makes Redmi K90 Ultra better?
- Higher AnTuTu: 3233695 vs 581041
- Better Geekbench Single: 3013 vs 803
- Better Geekbench Multi: 9287 vs 2047
- Bigger battery: 8550 vs 6000 mAh
- Faster charging: 100W vs 15W
- Higher refresh rate: 165Hz vs 120Hz
- Higher performance (92/100 vs 45/100)
- Better camera (37/100 vs 30/100)
- Longer battery life (78/100 vs 60/100)
- Better display (94/100 vs 66/100)
Comparison verdict
Comparing the Realme C83 5G vs the Redmi K90 Ultra, the Redmi K90 Ultra scores 26 points higher (73/100 vs 47/100). In the "performance" category, the Redmi K90 Ultra leads (92/100 vs 45/100). In the "battery" category, the Redmi K90 Ultra leads (78/100 vs 60/100). Value score: Realme C83 5G — 74/100, Redmi K90 Ultra — 72/100; 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 Realme C83 5G (92/100 vs 45/100). In the "display" category, the Redmi K90 Ultra notably outperforms the Realme C83 5G (94/100 vs 66/100). In the "camera" category, the Redmi K90 Ultra is a bit better (37/100 vs 30/100). In the "battery" category, the Redmi K90 Ultra notably outperforms the Realme C83 5G (78/100 vs 60/100). In the "portability" category, the Realme C83 5G notably outperforms the Redmi K90 Ultra (61/100 vs 40/100).
Specs comparison
| Specification | Realme C83 5G | Redmi K90 Ultra | |
|---|---|---|---|
| Processor | MediaTek Dimensity 6400 | Qualcomm Snapdragon 8 Elite | |
| AnTuTu | 581041 | 3233695 | |
| Geekbench Single | 803 | 3013 | |
| Geekbench Multi | 2047 | 9287 | |
| Display | 6.7" IPS LCD | 6.8" AMOLED | |
| Resolution | 2400x1080 | 1280x2772 | |
| Refresh rate | 120 Hz | 165 Hz | |
| Battery | 6000 mAh | 8550 mAh | |
| Charging | 15W | 100W | |
| Main camera | 50 MP | 50 MP | |
| Ultrawide | 0 MP | 8 MP | |
| Front camera | 8 MP | 20 MP | |
| RAM | 4GB / 6GB | 12GB / 16GB | |
| Storage | 64GB / 128GB | 256GB / 512GB | |
| OS | Android 15 | Android 16 | |
| Brightness (peak) | — | 3500 nits | |
| NFC | — | yes | |
| Protection | — | IP68/IP69 | |
| Dimensions | — | 162.9×77.9×8.2 mm | |
| Weight | 198 g | 227 g | |
| Launch price | $130 | $420 |
Camera comparison
Realme C83 5G
- Main: 50MP f/1.8
- Front: 8MP
Redmi K90 Ultra
- Main: 50MP f/1.7
- Ultrawide: 8MP
- Front: 20MP
Display comparison
Realme C83 5G
- 6.7" IPS LCD
- Resolution: 2400x1080
- Refresh rate: 120 Hz
Redmi K90 Ultra
- 6.8" AMOLED
- Resolution: 1280x2772
- Refresh rate: 165 Hz
Battery and charging
Realme C83 5G
- 6000 mAh
- Wired: 15W
- Wireless charging: no data
Redmi K90 Ultra
- 8550 mAh
- Wired: 100W
- No wireless charging
Overall performance score
We compared Realme C83 5G and Redmi K90 Ultra, covering their specs and all relevant benchmarks.
Redmi K90 Ultra leads Realme C83 5G by 82.0% in our overall performance rating.
Benchmarks
Launch prices and where to check today's
Launch price difference: $290. Realme C83 5G was $290 cheaper at launch.
Detailed category analysis
performance
In the "performance" category, the Redmi K90 Ultra significantly outperforms the Realme C83 5G (92/100 vs 45/100).
display
In the "display" category, the Redmi K90 Ultra notably outperforms the Realme C83 5G (94/100 vs 66/100).
camera
In the "camera" category, the Redmi K90 Ultra is a bit better (37/100 vs 30/100).
battery
In the "battery" category, the Redmi K90 Ultra notably outperforms the Realme C83 5G (78/100 vs 60/100).
portability
In the "portability" category, the Realme C83 5G notably outperforms the Redmi K90 Ultra (61/100 vs 40/100).
Frequently asked questions
Which is better: the Realme C83 5G or the Redmi K90 Ultra?
The Redmi K90 Ultra significantly outperforms the Realme C83 5G by 26 points (73/100 vs 47/100).
What is the rating of the Realme C83 5G and the Redmi K90 Ultra?
The Realme C83 5G has a MobileRank rating of 47/100, the Redmi K90 Ultra — 73/100.
Which has the better camera: the Realme C83 5G or the Redmi K90 Ultra?
The Redmi K90 Ultra leads on camera score (37/100 vs 30/100).
Which is more powerful: the Realme C83 5G or the Redmi K90 Ultra?
The Redmi K90 Ultra leads on performance (92/100 vs 45/100).
Should you choose the Realme C83 5G over the Redmi K90 Ultra?
The Redmi K90 Ultra is a better fit for gamers and power users, those who care about battery life.