Sony Xperia 5 III vs Xiaomi 15 Ultra
The Sony Xperia 5 III (2021) runs on the Snapdragon 888, while the Xiaomi 15 Ultra (2025) runs on the Qualcomm Snapdragon 8 Elite; launch prices were $999 and $999. By overall MobileRank rating, the Xiaomi 15 Ultra leads — 85/100 vs 51/100 (a 34-point difference). Key differences: the Xiaomi 15 Ultra has the bigger battery (6000 mAh vs 4500); the main camera is 12 MP vs 50 MP; the Xiaomi 15 Ultra is faster in AnTuTu (3,030,376 vs 1,135,878); the Sony Xperia 5 III is noticeably lighter (168g vs 225g).
Profile comparison
Category scores
Sony Xperia 5 III
Xiaomi 15 Ultra
What makes Sony Xperia 5 III better?
- Lighter: 168g vs 225g
- Better portability (76/100 vs 29/100)
What makes Xiaomi 15 Ultra better?
- Higher AnTuTu: 3030376 vs 1135878
- Better Geekbench Single: 3050 vs 1500
- Better Geekbench Multi: 10200 vs 3537
- Bigger battery: 6000 vs 4500 mAh
- Faster charging: 90W vs 30W
- Better main camera: 50MP vs 12MP
- Higher performance (92/100 vs 64/100)
- Better camera (87/100 vs 20/100)
- Longer battery life (80/100 vs 35/100)
- Better display (90/100 vs 84/100)
Comparison verdict
Comparing the Sony Xperia 5 III vs the Xiaomi 15 Ultra, the Xiaomi 15 Ultra scores 34 points higher (85/100 vs 51/100). In the "performance" category, the Xiaomi 15 Ultra leads (92/100 vs 64/100). In the "camera" category, the Xiaomi 15 Ultra leads (87/100 vs 20/100). In the "battery" category, the Xiaomi 15 Ultra leads (80/100 vs 35/100). Value score: Sony Xperia 5 III — 12/100, Xiaomi 15 Ultra — 80/100; 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 Xiaomi 15 Ultra notably outperforms the Sony Xperia 5 III (92/100 vs 64/100). In the "display" category, the Xiaomi 15 Ultra is a bit better (90/100 vs 84/100). In the "camera" category, the Xiaomi 15 Ultra significantly outperforms the Sony Xperia 5 III (87/100 vs 20/100). In the "battery" category, the Xiaomi 15 Ultra significantly outperforms the Sony Xperia 5 III (80/100 vs 35/100). In the "portability" category, the Sony Xperia 5 III significantly outperforms the Xiaomi 15 Ultra (76/100 vs 29/100).
Specs comparison
| Specification | Sony Xperia 5 III | Xiaomi 15 Ultra | |
|---|---|---|---|
| Processor | Snapdragon 888 | Qualcomm Snapdragon 8 Elite | |
| AnTuTu | 1135878 | 3030376 | |
| Geekbench Single | 1500 | 3050 | |
| Geekbench Multi | 3537 | 10200 | |
| Display | 6.1" OLED | 6.7" LTPO AMOLED | |
| Resolution | 1080x2520 | 3200x1440 | |
| Refresh rate | 120 Hz | 120 Hz | |
| Battery | 4500 mAh | 6000 mAh | |
| Charging | 30W | 90W | |
| Wireless charging | 0W | 50W | |
| DXOMark (camera) | — | 159 | |
| Main camera | 12 MP | 50 MP | |
| Ultrawide | 12 MP | 50 MP | |
| Telephoto | 12 MP | 50 MP | |
| Front camera | 8 MP | 32 MP | |
| RAM | 8GB | 16GB | |
| Storage | 128GB / 256GB | 256GB / 512GB / 1TB | |
| OS | Android 11 | Android 15 / HyperOS 2 | |
| Brightness (peak) | — | 3200 nits | |
| NFC | yes | yes | |
| Protection | IP65/IP68 | IP68 | |
| Dimensions | 157.0×68.0×8.2 mm | 161.3×75.3×9.4 mm | |
| Weight | 168 g | 225 g | |
| Launch price | $999 | $999 |
Camera comparison
Sony Xperia 5 III
- Main: 12MP f/1.7
- Ultrawide: 12MP
- Telephoto: 12MP
- Front: 8MP
Xiaomi 15 Ultra
- Main: 50MP f/1.63
- Ultrawide: 50MP
- Telephoto: 50MP
- Front: 32MP
Display comparison
Sony Xperia 5 III
- 6.1" OLED
- Resolution: 1080x2520
- Refresh rate: 120 Hz
Xiaomi 15 Ultra
- 6.7" LTPO AMOLED
- Resolution: 3200x1440
- Refresh rate: 120 Hz
Battery and charging
Sony Xperia 5 III
- 4500 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 Sony Xperia 5 III and Xiaomi 15 Ultra, covering their specs and all relevant benchmarks.
Xiaomi 15 Ultra leads Sony Xperia 5 III by 62.5% in our overall performance rating.
Benchmarks
Launch prices and where to check today's
Launch price difference: $0. Same launch price.
Detailed category analysis
performance
In the "performance" category, the Xiaomi 15 Ultra notably outperforms the Sony Xperia 5 III (92/100 vs 64/100).
display
In the "display" category, the Xiaomi 15 Ultra is a bit better (90/100 vs 84/100).
camera
In the "camera" category, the Xiaomi 15 Ultra significantly outperforms the Sony Xperia 5 III (87/100 vs 20/100).
battery
In the "battery" category, the Xiaomi 15 Ultra significantly outperforms the Sony Xperia 5 III (80/100 vs 35/100).
portability
In the "portability" category, the Sony Xperia 5 III significantly outperforms the Xiaomi 15 Ultra (76/100 vs 29/100).
Frequently asked questions
Which is better: the Sony Xperia 5 III or the Xiaomi 15 Ultra?
The Xiaomi 15 Ultra significantly outperforms the Sony Xperia 5 III by 34 points (85/100 vs 51/100).
What is the rating of the Sony Xperia 5 III and the Xiaomi 15 Ultra?
The Sony Xperia 5 III has a MobileRank rating of 51/100, the Xiaomi 15 Ultra — 85/100.
Which has the better camera: the Sony Xperia 5 III or the Xiaomi 15 Ultra?
The Xiaomi 15 Ultra leads on camera score (87/100 vs 20/100).
Which is more powerful: the Sony Xperia 5 III or the Xiaomi 15 Ultra?
The Xiaomi 15 Ultra leads on performance (92/100 vs 64/100).
Should you choose the Sony Xperia 5 III over the Xiaomi 15 Ultra?
The Sony Xperia 5 III is a better fit for active users. 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.