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InnoReviews

REDMI K90 Ultra vs Vivo S2

WINNER
REDMI K90 Ultra
69.1Inno Score
VS
Vivo S2
48.5Inno Score
64.4Performance28.9
78.7Display65.5
43.4Camera34.1
83.2Battery70.9
86.7Features57.3
7 spec wins — REDMI K90 Ultra5 spec wins — Vivo S2

InnoReviews verdict

REDMI K90 Ultra wins this phone face-off, 69.1 to 48.5, pulling ahead mainly in performance (+36) and features (+29). Vivo S2 still makes sense if its price or standout specs fit your needs better.

Which would you pick?

Key differences

Reasons to pick the REDMI K90 Ultra

  • Stronger performance score: 64 vs 29
  • Stronger display score: 79 vs 66
  • Stronger camera score: 43 vs 34
  • Stronger battery score: 83 vs 71
  • Stronger features score: 87 vs 57

Reasons to pick the Vivo S2

  • 60% higher Front camera: 32 MP vs 20 MP
  • 13% lower weight: 197 g vs 227 g

Display

Display comparison: REDMI K90 Ultra versus Vivo S2
SpecREDMI K90 UltraVivo S2
Screen size6.83 ″6.83 ″
Panel typeAMOLED3D Curved AMOLED
Resolution1280x27721260x2800
Pixel density447 ppi449 ppi
Refresh rate165 Hz+38%120 Hz
Peak brightness3,500 nits+17%3,000 nits
Screen-to-body90.3 %91.4 %+1%

Performance

Performance comparison: REDMI K90 Ultra versus Vivo S2
SpecREDMI K90 UltraVivo S2
ChipsetSnapdragon 8 EliteMediaTek Dimensity 7360-Turbo
RAM (max)16 GB+100%8 GB
Storage options256/512GB128/256GB
Storage typeUFS 4.1UFS 3.1

Camera

Camera comparison: REDMI K90 Ultra versus Vivo S2
SpecREDMI K90 UltraVivo S2
Main camera50 MP50 MP
Main aperturef/1.7f/1.8
Ultra-wide8 MP—
Max video8K@30fps—
Front camera20 MP32 MP+60%
OISYesNo

Battery

Battery comparison: REDMI K90 Ultra versus Vivo S2
SpecREDMI K90 UltraVivo S2
Capacity8,550 mAh+21%7,050 mAh
Wired charging100 W+127%44 W

Design

Design comparison: REDMI K90 Ultra versus Vivo S2
SpecREDMI K90 UltraVivo S2
Weight227 g197 g+13%
Thickness8.2 mm8 mm+3%
IP ratingIP68/IP69IP68/IP69
Frame materialAluminumPlastic

Connectivity

Connectivity comparison: REDMI K90 Ultra versus Vivo S2
SpecREDMI K90 UltraVivo S2
5GYesYes
Wi-FiWi-Fi 7Wi-Fi 5
Bluetooth5.45.4
NFCYesNo
USBUSB-CUSB-C 2.0
eSIMNoNo

Software

Software comparison: REDMI K90 Ultra versus Vivo S2
SpecREDMI K90 UltraVivo S2
OS at launchAndroid 16 (HyperOS 3)Android 16 (OriginOS 6)
OS update pledge—3 years

Audio

Audio comparison: REDMI K90 Ultra versus Vivo S2
SpecREDMI K90 UltraVivo S2
Stereo speakersYesYes
3.5mm jackNoNo

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