Redmi K90 vs Vivo Y31s 5G

The Redmi K90 (2025) runs on the Qualcomm Snapdragon 8 Elite, while the Vivo Y31s 5G (2026) runs on the Qualcomm Snapdragon 4 Gen 2; launch prices were $401 and $200. By overall MobileRank rating, the Redmi K90 leads — 76/100 vs 47/100 (a 29-point difference). Key differences: the Redmi K90 has the bigger battery (7100 mAh vs 6500); the Redmi K90 is faster in AnTuTu (3,077,585 vs 568,395); the Redmi K90 has NFC for contactless payments, the Vivo Y31s 5G doesn't.

The Redmi K90 significantly outperforms the Vivo Y31s 5G by 29 points (76/100 vs 47/100).

Profile comparison

Category scores

Redmi K90

Performance 91
Display 82
Camera 58
Battery 72
Portability 55
Value for money 80

Vivo Y31s 5G

Performance 46
Display 55
Camera 37
Battery 58
Portability 50
Value for money 54

What makes Redmi K90 better?

  • Higher AnTuTu: 3077585 vs 568395
  • Better Geekbench Single: 3013 vs 915
  • Better Geekbench Multi: 9287 vs 2115
  • Bigger battery: 7100 vs 6500 mAh
  • Faster charging: 100W vs 44W
  • Lighter: 206g vs 207g

  • Higher performance (91/100 vs 46/100)
  • Better camera (58/100 vs 37/100)
  • Longer battery life (72/100 vs 58/100)
  • Better display (82/100 vs 55/100)
  • Better portability (55/100 vs 50/100)

What makes Vivo Y31s 5G better?

  • Cheaper at launch: $200 vs $401

  • Overall rating 47/100

Comparison verdict

Comparing the Redmi K90 vs the Vivo Y31s 5G, the Redmi K90 scores 29 points higher (76/100 vs 47/100). In the "performance" category, the Redmi K90 leads (91/100 vs 46/100). In the "camera" category, the Redmi K90 leads (58/100 vs 37/100). In the "battery" category, the Redmi K90 leads (72/100 vs 58/100). Value score: Redmi K90 — 80/100, Vivo Y31s 5G — 54/100; 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 Redmi K90 significantly outperforms the Vivo Y31s 5G (91/100 vs 46/100). In the "display" category, the Redmi K90 notably outperforms the Vivo Y31s 5G (82/100 vs 55/100). In the "camera" category, the Redmi K90 notably outperforms the Vivo Y31s 5G (58/100 vs 37/100). In the "battery" category, the Redmi K90 is a bit better (72/100 vs 58/100). In the "portability" category, the Redmi K90 is a bit better (55/100 vs 50/100).

Redmi K90: The Redmi K90 is a better fit for gamers and power users, budget-conscious buyers.

Specs comparison

Specification Redmi K90 Vivo Y31s 5G
Processor Qualcomm Snapdragon 8 Elite Qualcomm Snapdragon 4 Gen 2
AnTuTu 3077585 568395
Geekbench Single 3013 915
Geekbench Multi 9287 2115
Display 6.6" AMOLED 6.7" IPS LCD
Resolution 2510x1156 1600x720
Refresh rate 120 Hz 120 Hz
Battery 7100 mAh 6500 mAh
Charging 100W 44W
Main camera 50 MP 50 MP
Ultrawide 8 MP 0 MP
Telephoto 50 MP 0 MP
Front camera 20 MP 32 MP
RAM 12GB / 16GB 8GB
Storage 256GB / 512GB 256GB
OS Android 16 Android 16
Brightness (peak) 3500 nits —
NFC yes no
Protection IP68 —
Dimensions 157.5×75.3×8.0 mm 164.2×75.4×8.4 mm
Weight 206 g 207 g
Launch price $401 $200

Camera comparison

Redmi K90

  • Main: 50MP f/1.9
  • Ultrawide: 8MP
  • Telephoto: 50MP
  • Front: 20MP
58
camera

Vivo Y31s 5G

  • Main: 50MP f/1.8
  • Front: 32MP
37
camera

Display comparison

Redmi K90

  • 6.6" AMOLED
  • Resolution: 2510x1156
  • Refresh rate: 120 Hz
82
display

Vivo Y31s 5G

  • 6.7" IPS LCD
  • Resolution: 1600x720
  • Refresh rate: 120 Hz
55
display

Battery and charging

Redmi K90

  • 7100 mAh
  • Wired: 100W
  • No wireless charging
72
battery

Vivo Y31s 5G

  • 6500 mAh
  • Wired: 44W
  • No wireless charging
58
battery

Overall performance score

We compared Redmi K90 and Vivo Y31s 5G, covering their specs and all relevant benchmarks.

Redmi K90 Qualcomm Snapdragon 8 Elite
76/100
3077585 AnTuTu
Vivo Y31s 5G Qualcomm Snapdragon 4 Gen 2
47/100 -441.5%
568395 AnTuTu

Redmi K90 leads Vivo Y31s 5G by 441.5% in our overall performance rating.

Benchmarks

Launch prices and where to check today's

Redmi K90

$401

Vivo Y31s 5G

$200

Launch price difference: $201. Vivo Y31s 5G was $201 cheaper at launch.

Detailed category analysis

performance

In the "performance" category, the Redmi K90 significantly outperforms the Vivo Y31s 5G (91/100 vs 46/100).

display

In the "display" category, the Redmi K90 notably outperforms the Vivo Y31s 5G (82/100 vs 55/100).

camera

In the "camera" category, the Redmi K90 notably outperforms the Vivo Y31s 5G (58/100 vs 37/100).

battery

In the "battery" category, the Redmi K90 is a bit better (72/100 vs 58/100).

portability

In the "portability" category, the Redmi K90 is a bit better (55/100 vs 50/100).

Frequently asked questions

Which is better: the Redmi K90 or the Vivo Y31s 5G?

The Redmi K90 significantly outperforms the Vivo Y31s 5G by 29 points (76/100 vs 47/100).

What is the rating of the Redmi K90 and the Vivo Y31s 5G?

The Redmi K90 has a MobileRank rating of 76/100, the Vivo Y31s 5G — 47/100.

Which has the better camera: the Redmi K90 or the Vivo Y31s 5G?

The Redmi K90 leads on camera score (58/100 vs 37/100).

Which is more powerful: the Redmi K90 or the Vivo Y31s 5G?

The Redmi K90 leads on performance (91/100 vs 46/100).

Should you choose the Redmi K90 over the Vivo Y31s 5G?

The Redmi K90 is a better fit for gamers and power users, budget-conscious buyers.