Nothing Phone (4b) vs Xiaomi 15 Ultra
The Nothing Phone (4b) (2026) runs on the Qualcomm Snapdragon 6 Gen 4, while the Xiaomi 15 Ultra (2025) runs on the Qualcomm Snapdragon 8 Elite; estimated prices are $355 and $999. By overall MobileRank rating, the Xiaomi 15 Ultra leads — 85/100 vs 55/100 (a 30-point difference). Key differences: the Xiaomi 15 Ultra has the bigger battery (6000 mAh vs 5200); the Xiaomi 15 Ultra is faster in AnTuTu (3,030,376 vs 969,048); the Nothing Phone (4b) is noticeably lighter (210g vs 225g).
Nothing Phone (4b)
Xiaomi 15 Ultra
- Lighter: 210g vs 225g
- Cheaper: $355 vs $999
- Better portability (47/100 vs 29/100)
- Higher AnTuTu: 3030376 vs 969048
- Better Geekbench Single: 3050 vs 1071
- Better Geekbench Multi: 10200 vs 3057
- Bigger battery: 6000 vs 5200 mAh
- Faster charging: 90W vs 33W
- Higher performance (92/100 vs 58/100)
- Better camera (87/100 vs 35/100)
- Longer battery life (80/100 vs 59/100)
- Better display (90/100 vs 79/100)
- Better value for money (82/100 vs 50/100)
Comparing the Nothing Phone (4b) vs the Xiaomi 15 Ultra, the Xiaomi 15 Ultra scores 30 points higher (85/100 vs 55/100). In the "performance" category, the Xiaomi 15 Ultra leads (92/100 vs 58/100). In the "camera" category, the Xiaomi 15 Ultra leads (87/100 vs 35/100). In the "battery" category, the Xiaomi 15 Ultra leads (80/100 vs 59/100). In the "value for money" category, the Xiaomi 15 Ultra leads (82/100 vs 50/100). In the "performance" category, the Xiaomi 15 Ultra significantly outperforms the Nothing Phone (4b) (92/100 vs 58/100). In the "display" category, the Xiaomi 15 Ultra is a bit better (90/100 vs 79/100). In the "camera" category, the Xiaomi 15 Ultra significantly outperforms the Nothing Phone (4b) (87/100 vs 35/100). In the "battery" category, the Xiaomi 15 Ultra notably outperforms the Nothing Phone (4b) (80/100 vs 59/100). In the "portability" category, the Nothing Phone (4b) notably outperforms the Xiaomi 15 Ultra (47/100 vs 29/100). In the "value for money" category, the Xiaomi 15 Ultra significantly outperforms the Nothing Phone (4b) (82/100 vs 50/100).
| Specification | Nothing Phone (4b) | Xiaomi 15 Ultra | |
|---|---|---|---|
| Processor | Qualcomm Snapdragon 6 Gen 4 | Qualcomm Snapdragon 8 Elite | |
| AnTuTu | 969048 | 3030376 | |
| Geekbench Single | 1071 | 3050 | |
| Geekbench Multi | 3057 | 10200 | |
| Display | 6.8" AMOLED | 6.7" LTPO AMOLED | |
| Resolution | 1080x2344 | 3200x1440 | |
| Refresh rate | 120 Hz | 120 Hz | |
| Battery | 5200 mAh | 6000 mAh | |
| Charging | 33W | 90W | |
| Wireless charging | — | 50W | |
| DXOMark (camera) | — | 159 | |
| Main camera | 50 MP | 50 MP | |
| Ultrawide | 8 MP | 50 MP | |
| Telephoto | 0 MP | 50 MP | |
| Front camera | 16 MP | 32 MP | |
| RAM | 8GB | 16GB | |
| Storage | 128GB / 256GB | 256GB / 512GB / 1TB | |
| OS | Android 16 | Android 15 / HyperOS 2 | |
| Brightness (peak) | 2000 nits | 3200 nits | |
| NFC | yes | yes | |
| Protection | IP64 | IP68 | |
| Dimensions | 164.4×78.2×8.6 mm | 161.3×75.3×9.4 mm | |
| Weight | 210 g | 225 g | |
| Price | $355 | $999 |
Nothing Phone (4b)
- Main: 50MP f/1.8
- Ultrawide: 8MP
- Front: 16MP
Xiaomi 15 Ultra
- Main: 50MP f/f/1.63
- Ultrawide: 50MP
- Telephoto: 50MP
- Front: 32MP
Nothing Phone (4b)
- 6.8" AMOLED
- Resolution: 1080x2344
- Refresh rate: 120 Hz
Xiaomi 15 Ultra
- 6.7" LTPO AMOLED
- Resolution: 3200x1440
- Refresh rate: 120 Hz
Nothing Phone (4b)
- 5200 mAh
- Wired: 33W
- Wireless charging: no data
Xiaomi 15 Ultra
- 6000 mAh
- NanoReview test: web browsing 12:19 hrs, total 30:03 hrs
- Wired: 90W
- Wireless: 50W
We compared Nothing Phone (4b) and Xiaomi 15 Ultra, covering their specs and all relevant benchmarks.
Xiaomi 15 Ultra leads Nothing Phone (4b) by 68.0% in our overall performance rating.
Price difference: $644. Nothing Phone (4b) is cheaper by $644.
performance
In the "performance" category, the Xiaomi 15 Ultra significantly outperforms the Nothing Phone (4b) (92/100 vs 58/100).
display
In the "display" category, the Xiaomi 15 Ultra is a bit better (90/100 vs 79/100).
camera
In the "camera" category, the Xiaomi 15 Ultra significantly outperforms the Nothing Phone (4b) (87/100 vs 35/100).
battery
In the "battery" category, the Xiaomi 15 Ultra notably outperforms the Nothing Phone (4b) (80/100 vs 59/100).
portability
In the "portability" category, the Nothing Phone (4b) notably outperforms the Xiaomi 15 Ultra (47/100 vs 29/100).
value for money
In the "value for money" category, the Xiaomi 15 Ultra significantly outperforms the Nothing Phone (4b) (82/100 vs 50/100).
Which is better: the Nothing Phone (4b) or the Xiaomi 15 Ultra?
The Xiaomi 15 Ultra significantly outperforms the Nothing Phone (4b) by 30 points (85/100 vs 55/100).
What is the rating of the Nothing Phone (4b) and the Xiaomi 15 Ultra?
The Nothing Phone (4b) has a MobileRank rating of 55/100, the Xiaomi 15 Ultra — 85/100.
Which has the better camera: the Nothing Phone (4b) or the Xiaomi 15 Ultra?
The Xiaomi 15 Ultra leads on camera score (87/100 vs 35/100).
Which is more powerful: the Nothing Phone (4b) or the Xiaomi 15 Ultra?
The Xiaomi 15 Ultra leads on performance (92/100 vs 58/100).
Should you choose the Nothing Phone (4b) over the Xiaomi 15 Ultra?
The Nothing Phone (4b) is a better fit for everyday use. 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.