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InnoReviews

Nothing Phone (4b) vs REDMI K90 Ultra

Nothing Phone (4b)
44.2Inno Score
VS
WINNER
REDMI K90 Ultra
69.1Inno Score
28.9Performance64.4
52.8Display78.7
42.6Camera43.4
49.7Battery83.2
65.3Features86.7
1 spec wins — Nothing Phone (4b)10 spec wins — REDMI K90 Ultra

InnoReviews verdict

REDMI K90 Ultra wins this phone face-off, 69.1 to 44.2, pulling ahead mainly in performance (+36) and battery (+34). 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 REDMI K90 Ultra

  • Stronger performance score: 64 vs 29
  • Stronger display score: 79 vs 53
  • Stronger battery score: 83 vs 50
  • Stronger features score: 87 vs 65
  • 203% higher Wired charging: 100 W vs 33 W

Display

Display comparison: Nothing Phone (4b) versus REDMI K90 Ultra
SpecNothing Phone (4b)REDMI K90 Ultra
Screen size6.77 ″6.83 ″+1%
Panel typeAMOLEDAMOLED
Resolution1080x23441280x2772
Pixel density381 ppi447 ppi+17%
Refresh rate120 Hz165 Hz+38%
Peak brightness2,000 nits3,500 nits+75%
Screen-to-body87.4 %90.3 %+3%

Performance

Performance comparison: Nothing Phone (4b) versus REDMI K90 Ultra
SpecNothing Phone (4b)REDMI K90 Ultra
ChipsetSnapdragon 6 Gen 4Snapdragon 8 Elite
RAM (max)8 GB16 GB+100%
Storage options128GB/256GB256/512GB
Storage typeUFS 2.2UFS 4.1

Camera

Camera comparison: Nothing Phone (4b) versus REDMI K90 Ultra
SpecNothing Phone (4b)REDMI K90 Ultra
Main camera50 MP50 MP
Main aperturef/1.8f/1.7
Ultra-wide8 MP8 MP
Max video4K@30fps8K@30fps
Front camera16 MP20 MP+25%
OISYesYes

Battery

Battery comparison: Nothing Phone (4b) versus REDMI K90 Ultra
SpecNothing Phone (4b)REDMI K90 Ultra
Capacity5,200 mAh8,550 mAh+64%
Wired charging33 W100 W+203%
Wireless charging0 W—

Design

Design comparison: Nothing Phone (4b) versus REDMI K90 Ultra
SpecNothing Phone (4b)REDMI K90 Ultra
Weight210 g+7%227 g
Thickness8.6 mm8.2 mm+5%
IP ratingIP64IP68/IP69
Frame materialPlasticAluminum

Connectivity

Connectivity comparison: Nothing Phone (4b) versus REDMI K90 Ultra
SpecNothing Phone (4b)REDMI K90 Ultra
5GYesYes
Wi-FiWi-Fi 6Wi-Fi 7
Bluetooth6.05.4
NFCYesYes
USBUSB-C 2.0USB-C
eSIM—No

Software

Software comparison: Nothing Phone (4b) versus REDMI K90 Ultra
SpecNothing Phone (4b)REDMI K90 Ultra
OS at launchAndroid 16 (Nothing OS 4.1)Android 16 (HyperOS 3)
OS update pledge3 years—

Audio

Audio comparison: Nothing Phone (4b) versus REDMI K90 Ultra
SpecNothing Phone (4b)REDMI K90 Ultra
Stereo speakersYesYes
3.5mm jackNoNo

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