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InnoReviews

Nothing Phone (4b) vs Xiaomi 15 Ultra

Nothing Phone (4b)
44.2Inno Score
VS
WINNER
Xiaomi 15 Ultra

Xiaomi

Xiaomi 15 Ultra

$1,499

75.9Inno Score
28.9Performance79.1
52.8Display69.1
42.6Camera73.2
49.7Battery79
65.3Features78.7
3 spec wins — Nothing Phone (4b)10 spec wins — Xiaomi 15 Ultra

InnoReviews verdict

Xiaomi 15 Ultra wins this phone face-off, 75.9 to 44.2, pulling ahead mainly in performance (+50) and camera (+31). Nothing Phone (4b) still makes sense if its price or standout specs fit your needs better.

Which would you pick?

Key differences

Reasons to pick the Nothing Phone (4b)

No decisive spec advantages — this side competes on price and preference.

Reasons to pick the Xiaomi 15 Ultra

  • Stronger performance score: 79 vs 29
  • Stronger display score: 69 vs 53
  • Stronger camera score: 73 vs 43
  • Stronger battery score: 79 vs 50
  • Stronger features score: 79 vs 65

Display

Display comparison: Nothing Phone (4b) versus Xiaomi 15 Ultra
SpecNothing Phone (4b)Xiaomi 15 Ultra
Screen size6.77 ″+1%6.73 ″
Panel typeAMOLEDLTPO AMOLED
Resolution1080x23441440x3200
Pixel density381 ppi522 ppi+37%
Refresh rate120 Hz120 Hz
Peak brightness2,000 nits3,200 nits+60%
Screen-to-body87.4 %90 %+3%

Performance

Performance comparison: Nothing Phone (4b) versus Xiaomi 15 Ultra
SpecNothing Phone (4b)Xiaomi 15 Ultra
ChipsetSnapdragon 6 Gen 4Snapdragon 8 Elite
AnTuTu—2,650,000
Geekbench 6 (single)—3,050Top 12%
Geekbench 6 (multi)—9,600Top 11%
RAM (max)8 GB16 GB+100%
Storage options128GB/256GB256/512GB/1TB
Storage typeUFS 2.2UFS 4.1

Camera

Camera comparison: Nothing Phone (4b) versus Xiaomi 15 Ultra
SpecNothing Phone (4b)Xiaomi 15 Ultra
Main camera50 MP50 MP
Main aperturef/1.8f/1.63
Ultra-wide8 MP50 MP+525%
Telephoto—200 MP
Optical zoom—4.3 x
Max video4K@30fps8K@30fps
Front camera16 MP32 MP+100%
OISYesYes

Battery

Battery comparison: Nothing Phone (4b) versus Xiaomi 15 Ultra
SpecNothing Phone (4b)Xiaomi 15 Ultra
Capacity5,200 mAh5,410 mAh+4%
Wired charging33 W90 W+173%
Wireless charging0 W80 W
Active use endurance—12 h

Design

Design comparison: Nothing Phone (4b) versus Xiaomi 15 Ultra
SpecNothing Phone (4b)Xiaomi 15 Ultra
Weight210 g+7%226 g
Thickness8.6 mm+8%9.4 mm
IP ratingIP64IP68
Frame materialPlasticAluminum

Connectivity

Connectivity comparison: Nothing Phone (4b) versus Xiaomi 15 Ultra
SpecNothing Phone (4b)Xiaomi 15 Ultra
5GYesYes
Wi-FiWi-Fi 6Wi-Fi 7
Bluetooth6.06.0
NFCYesYes
USBUSB-C 2.0USB-C 3.2
eSIM—Yes

Software

Software comparison: Nothing Phone (4b) versus Xiaomi 15 Ultra
SpecNothing Phone (4b)Xiaomi 15 Ultra
OS at launchAndroid 16 (Nothing OS 4.1)Android 15 (HyperOS 2)
OS update pledge3 years4 years+33%

Audio

Audio comparison: Nothing Phone (4b) versus Xiaomi 15 Ultra
SpecNothing Phone (4b)Xiaomi 15 Ultra
Stereo speakersYesYes
3.5mm jackNoNo

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