Realme X3 vs Redmi K90 Ultra
The Realme X3 (2020) runs on the Qualcomm Snapdragon 855+, while the Redmi K90 Ultra (2026) runs on the Qualcomm Snapdragon 8 Elite. By overall MobileRank rating, the Redmi K90 Ultra leads — 73/100 vs 50/100 (a 23-point difference). Key differences: the Redmi K90 Ultra has the bigger battery (8550 mAh vs 4200); the main camera is 64 MP vs 50 MP; the Redmi K90 Ultra is faster in AnTuTu (3,233,695 vs 859,084); the Redmi K90 Ultra has NFC for contactless payments, the Realme X3 doesn't; the Realme X3 is noticeably lighter (202g vs 227g).
Profile comparison
Category scores
Realme X3
Redmi K90 Ultra
What makes Realme X3 better?
- Better main camera: 64MP vs 50MP
- Lighter: 202g vs 227g
- Better camera (48/100 vs 37/100)
- Better portability (48/100 vs 40/100)
What makes Redmi K90 Ultra better?
- Higher AnTuTu: 3233695 vs 859084
- Better Geekbench Single: 3013 vs 1031
- Better Geekbench Multi: 9287 vs 2864
- Bigger battery: 8550 vs 4200 mAh
- Faster charging: 100W vs 30W
- Higher refresh rate: 165Hz vs 120Hz
- Higher performance (92/100 vs 55/100)
- Longer battery life (78/100 vs 28/100)
- Better display (94/100 vs 70/100)
Comparison verdict
Comparing the Realme X3 vs the Redmi K90 Ultra, the Redmi K90 Ultra scores 23 points higher (73/100 vs 50/100). In the "performance" category, the Redmi K90 Ultra leads (92/100 vs 55/100). In the "camera" category, the Realme X3 leads (48/100 vs 37/100). In the "battery" category, the Redmi K90 Ultra leads (78/100 vs 28/100). In the "performance" category, the Redmi K90 Ultra significantly outperforms the Realme X3 (92/100 vs 55/100). In the "display" category, the Redmi K90 Ultra notably outperforms the Realme X3 (94/100 vs 70/100). In the "camera" category, the Realme X3 is a bit better (48/100 vs 37/100). In the "battery" category, the Redmi K90 Ultra significantly outperforms the Realme X3 (78/100 vs 28/100). In the "portability" category, the Realme X3 is a bit better (48/100 vs 40/100).
Specs comparison
| Specification | Realme X3 | Redmi K90 Ultra | |
|---|---|---|---|
| Processor | Qualcomm Snapdragon 855+ | Qualcomm Snapdragon 8 Elite | |
| AnTuTu | 859084 | 3233695 | |
| Geekbench Single | 1031 | 3013 | |
| Geekbench Multi | 2864 | 9287 | |
| Display | 6.0" IPS LCD | 6.8" AMOLED | |
| Resolution | 1080x2400 | 1280x2772 | |
| Refresh rate | 120 Hz | 165 Hz | |
| Battery | 4200 mAh | 8550 mAh | |
| Charging | 30W | 100W | |
| Main camera | 64 MP | 50 MP | |
| Ultrawide | 8 MP | 8 MP | |
| Telephoto | 12 MP | 0 MP | |
| Front camera | 16 MP | 20 MP | |
| RAM | 6GB / 8GB | 12GB / 16GB | |
| Storage | 128GB | 256GB / 512GB | |
| OS | Android 10, Realme UI | Android 16 | |
| Brightness (peak) | — | 3500 nits | |
| NFC | no | yes | |
| Protection | — | IP68/IP69 | |
| Dimensions | 163.8×75.8×8.9 mm | 162.9×77.9×8.2 mm | |
| Weight | 202 g | 227 g | |
| Launch price | — | $420 |
Camera comparison
Realme X3
- Main: 64MP f/1.8
- Ultrawide: 8MP
- Telephoto: 12MP
- Front: 16MP
Redmi K90 Ultra
- Main: 50MP f/1.7
- Ultrawide: 8MP
- Front: 20MP
Display comparison
Realme X3
- 6.0" IPS LCD
- Resolution: 1080x2400
- Refresh rate: 120 Hz
Redmi K90 Ultra
- 6.8" AMOLED
- Resolution: 1280x2772
- Refresh rate: 165 Hz
Battery and charging
Realme X3
- 4200 mAh
- Wired: 30W
- No wireless charging
Redmi K90 Ultra
- 8550 mAh
- Wired: 100W
- No wireless charging
Overall performance score
We compared Realme X3 and Redmi K90 Ultra, covering their specs and all relevant benchmarks.
Redmi K90 Ultra leads Realme X3 by 73.4% in our overall performance rating.
Benchmarks
Launch prices and where to check today's
Realme X3
Price unknownDetailed category analysis
performance
In the "performance" category, the Redmi K90 Ultra significantly outperforms the Realme X3 (92/100 vs 55/100).
display
In the "display" category, the Redmi K90 Ultra notably outperforms the Realme X3 (94/100 vs 70/100).
camera
In the "camera" category, the Realme X3 is a bit better (48/100 vs 37/100).
battery
In the "battery" category, the Redmi K90 Ultra significantly outperforms the Realme X3 (78/100 vs 28/100).
portability
In the "portability" category, the Realme X3 is a bit better (48/100 vs 40/100).
Frequently asked questions
Which is better: the Realme X3 or the Redmi K90 Ultra?
The Redmi K90 Ultra significantly outperforms the Realme X3 by 23 points (73/100 vs 50/100).
What is the rating of the Realme X3 and the Redmi K90 Ultra?
The Realme X3 has a MobileRank rating of 50/100, the Redmi K90 Ultra — 73/100.
Which has the better camera: the Realme X3 or the Redmi K90 Ultra?
The Realme X3 leads on camera score (48/100 vs 37/100).
Which is more powerful: the Realme X3 or the Redmi K90 Ultra?
The Redmi K90 Ultra leads on performance (92/100 vs 55/100).
Should you choose the Realme X3 over the Redmi K90 Ultra?
The Redmi K90 Ultra is a better fit for gamers and power users, those who care about battery life.