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; launch prices were $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 975,254); the Nothing Phone (4b) is noticeably lighter (210g vs 225g).
Profile comparison
Category scores
Nothing Phone (4b)
Xiaomi 15 Ultra
What makes Nothing Phone (4b) better?
- Lighter: 210g vs 225g
- Cheaper at launch: $355 vs $999
- Better portability (47/100 vs 29/100)
What makes Xiaomi 15 Ultra better?
- Higher AnTuTu: 3030376 vs 975254
- Better Geekbench Single: 3050 vs 1087
- Better Geekbench Multi: 10200 vs 3148
- 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)
Comparison verdict
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). Value score: Nothing Phone (4b) — 42/100, 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 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).
Specs comparison
| Specification | Nothing Phone (4b) | Xiaomi 15 Ultra | |
|---|---|---|---|
| Processor | Qualcomm Snapdragon 6 Gen 4 | Qualcomm Snapdragon 8 Elite | |
| AnTuTu | 975254 | 3030376 | |
| Geekbench Single | 1087 | 3050 | |
| Geekbench Multi | 3148 | 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 | |
| Launch price | $355 | $999 |
Camera comparison
Nothing Phone (4b)
- Main: 50MP f/1.8
- Ultrawide: 8MP
- Front: 16MP
Xiaomi 15 Ultra
- Main: 50MP f/1.63
- Ultrawide: 50MP
- Telephoto: 50MP
- Front: 32MP
Display comparison
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
Battery and charging
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
Overall performance score
We compared Nothing Phone (4b) and Xiaomi 15 Ultra, covering their specs and all relevant benchmarks.
Xiaomi 15 Ultra leads Nothing Phone (4b) by 67.8% in our overall performance rating.
Benchmarks
Launch prices and where to check today's
Launch price difference: $644. Nothing Phone (4b) was $644 cheaper at launch.
Detailed category analysis
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).
Frequently asked questions
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 Xiaomi 15 Ultra is a better fit for gamers and power users, mobile photography enthusiasts, those who care about battery life, budget-conscious buyers.