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 (3,119,308 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).
Realme X3
Redmi K90 Ultra
- Better main camera: 64MP vs 50MP
- Lighter: 202g vs 227g
- Better camera (48/100 vs 37/100)
- Better portability (48/100 vs 40/100)
- Higher AnTuTu: 3119308 vs 859084
- Better Geekbench Single: 3041 vs 1031
- Better Geekbench Multi: 9494 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)
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).
| Specification | Realme X3 | Redmi K90 Ultra | |
|---|---|---|---|
| Processor | Qualcomm Snapdragon 855+ | Qualcomm Snapdragon 8 Elite | |
| AnTuTu | 859084 | 3119308 | |
| Geekbench Single | 1031 | 3041 | |
| Geekbench Multi | 2864 | 9494 | |
| 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 |
Realme X3
- Main: 64MP f/f/1.8
- Ultrawide: 8MP
- Telephoto: 12MP
- Front: 16MP
Redmi K90 Ultra
- Main: 50MP f/1.7
- Ultrawide: 8MP
- Front: 20MP
Realme X3
- 6.0" IPS LCD
- Resolution: 1080x2400
- Refresh rate: 120 Hz
Redmi K90 Ultra
- 6.8" AMOLED
- Resolution: 1280x2772
- Refresh rate: 165 Hz
Realme X3
- 4200 mAh
- Wired: 30W
- No wireless charging
Redmi K90 Ultra
- 8550 mAh
- Wired: 100W
- No wireless charging
We compared Realme X3 and Redmi K90 Ultra, covering their specs and all relevant benchmarks.
Redmi K90 Ultra leads Realme X3 by 72.5% in our overall performance rating.
Realme X3
Price unknownperformance
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).
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 Realme X3 is a better fit for everyday use. The Redmi K90 Ultra is a better fit for gamers and power users, those who care about battery life, budget-conscious buyers.