Realme X3 vs Xiaomi 15 Ultra
The Realme X3 (2020) runs on the Qualcomm Snapdragon 855+, while the Xiaomi 15 Ultra (2025) runs on the Qualcomm Snapdragon 8 Elite. By overall MobileRank rating, the Xiaomi 15 Ultra leads — 85/100 vs 50/100 (a 35-point difference). Key differences: the Xiaomi 15 Ultra has the bigger battery (6000 mAh vs 4200); the main camera is 64 MP vs 50 MP; the Xiaomi 15 Ultra is faster in AnTuTu (3,030,376 vs 859,084); the Xiaomi 15 Ultra has NFC for contactless payments, the Realme X3 doesn't; the Realme X3 is noticeably lighter (202g vs 225g).
Profile comparison
Category scores
Realme X3
Xiaomi 15 Ultra
What makes Realme X3 better?
- Better main camera: 64MP vs 50MP
- Lighter: 202g vs 225g
- Better portability (48/100 vs 29/100)
What makes Xiaomi 15 Ultra better?
- Higher AnTuTu: 3030376 vs 859084
- Better Geekbench Single: 3050 vs 1031
- Better Geekbench Multi: 10200 vs 2864
- Bigger battery: 6000 vs 4200 mAh
- Faster charging: 90W vs 30W
- Higher performance (92/100 vs 55/100)
- Better camera (87/100 vs 48/100)
- Longer battery life (80/100 vs 28/100)
- Better display (90/100 vs 70/100)
Comparison verdict
Comparing the Realme X3 vs the Xiaomi 15 Ultra, the Xiaomi 15 Ultra scores 35 points higher (85/100 vs 50/100). In the "performance" category, the Xiaomi 15 Ultra leads (92/100 vs 55/100). In the "camera" category, the Xiaomi 15 Ultra leads (87/100 vs 48/100). In the "battery" category, the Xiaomi 15 Ultra leads (80/100 vs 28/100). In the "performance" category, the Xiaomi 15 Ultra significantly outperforms the Realme X3 (92/100 vs 55/100). In the "display" category, the Xiaomi 15 Ultra notably outperforms the Realme X3 (90/100 vs 70/100). In the "camera" category, the Xiaomi 15 Ultra significantly outperforms the Realme X3 (87/100 vs 48/100). In the "battery" category, the Xiaomi 15 Ultra significantly outperforms the Realme X3 (80/100 vs 28/100). In the "portability" category, the Realme X3 notably outperforms the Xiaomi 15 Ultra (48/100 vs 29/100).
Specs comparison
| Specification | Realme X3 | Xiaomi 15 Ultra | |
|---|---|---|---|
| Processor | Qualcomm Snapdragon 855+ | Qualcomm Snapdragon 8 Elite | |
| AnTuTu | 859084 | 3030376 | |
| Geekbench Single | 1031 | 3050 | |
| Geekbench Multi | 2864 | 10200 | |
| Display | 6.0" IPS LCD | 6.7" LTPO AMOLED | |
| Resolution | 1080x2400 | 3200x1440 | |
| Refresh rate | 120 Hz | 120 Hz | |
| Battery | 4200 mAh | 6000 mAh | |
| Charging | 30W | 90W | |
| Wireless charging | 0W | 50W | |
| DXOMark (camera) | — | 159 | |
| Main camera | 64 MP | 50 MP | |
| Ultrawide | 8 MP | 50 MP | |
| Telephoto | 12 MP | 50 MP | |
| Front camera | 16 MP | 32 MP | |
| RAM | 6GB / 8GB | 16GB | |
| Storage | 128GB | 256GB / 512GB / 1TB | |
| OS | Android 10, Realme UI | Android 15 / HyperOS 2 | |
| Brightness (peak) | — | 3200 nits | |
| NFC | no | yes | |
| Protection | — | IP68 | |
| Dimensions | 163.8×75.8×8.9 mm | 161.3×75.3×9.4 mm | |
| Weight | 202 g | 225 g | |
| Launch price | — | $999 |
Camera comparison
Realme X3
- Main: 64MP f/1.8
- Ultrawide: 8MP
- Telephoto: 12MP
- Front: 16MP
Xiaomi 15 Ultra
- Main: 50MP f/1.63
- Ultrawide: 50MP
- Telephoto: 50MP
- Front: 32MP
Display comparison
Realme X3
- 6.0" IPS LCD
- Resolution: 1080x2400
- Refresh rate: 120 Hz
Xiaomi 15 Ultra
- 6.7" LTPO AMOLED
- Resolution: 3200x1440
- Refresh rate: 120 Hz
Battery and charging
Realme X3
- 4200 mAh
- Wired: 30W
- No wireless charging
Xiaomi 15 Ultra
- 6000 mAh
- NanoReview test: web browsing 12:19 hrs, total 30:03 hrs
- Wired: 90W
- Wireless: 50W
Overall performance score
We compared Realme X3 and Xiaomi 15 Ultra, covering their specs and all relevant benchmarks.
Xiaomi 15 Ultra leads Realme X3 by 71.7% 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 Xiaomi 15 Ultra significantly outperforms the Realme X3 (92/100 vs 55/100).
display
In the "display" category, the Xiaomi 15 Ultra notably outperforms the Realme X3 (90/100 vs 70/100).
camera
In the "camera" category, the Xiaomi 15 Ultra significantly outperforms the Realme X3 (87/100 vs 48/100).
battery
In the "battery" category, the Xiaomi 15 Ultra significantly outperforms the Realme X3 (80/100 vs 28/100).
portability
In the "portability" category, the Realme X3 notably outperforms the Xiaomi 15 Ultra (48/100 vs 29/100).
Frequently asked questions
Which is better: the Realme X3 or the Xiaomi 15 Ultra?
The Xiaomi 15 Ultra significantly outperforms the Realme X3 by 35 points (85/100 vs 50/100).
What is the rating of the Realme X3 and the Xiaomi 15 Ultra?
The Realme X3 has a MobileRank rating of 50/100, the Xiaomi 15 Ultra — 85/100.
Which has the better camera: the Realme X3 or the Xiaomi 15 Ultra?
The Xiaomi 15 Ultra leads on camera score (87/100 vs 48/100).
Which is more powerful: the Realme X3 or the Xiaomi 15 Ultra?
The Xiaomi 15 Ultra leads on performance (92/100 vs 55/100).
Should you choose the Realme X3 over the Xiaomi 15 Ultra?
The Xiaomi 15 Ultra is a better fit for gamers and power users, mobile photography enthusiasts, those who care about battery life, budget-conscious buyers.