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InnoReviews

OPPO K13 5G vs Samsung Galaxy S21 Ultra

OPPO K13 5G
46.6Inno Score
VS
WINNER
Samsung Galaxy S21 Ultra
53.9Inno Score
28.9Performance37.2
53.2Display56.3
30.7Camera72
79.8Battery46.4
52Features78.7
4 spec wins — OPPO K13 5G10 spec wins — Samsung Galaxy S21 Ultra

InnoReviews verdict

Samsung Galaxy S21 Ultra wins this phone face-off, 53.9 to 46.6, pulling ahead mainly in camera (+41) and features (+27). OPPO K13 5G still makes sense if its price or standout specs fit your needs better.

Which would you pick?

Key differences

Reasons to pick the OPPO K13 5G

  • Stronger battery score: 80 vs 46
  • 220% higher Wired charging: 80 W vs 25 W
  • 40% higher capacity: 7,000 mAh vs 5,000 mAh

Reasons to pick the Samsung Galaxy S21 Ultra

  • Stronger performance score: 37 vs 29
  • Stronger display score: 56 vs 53
  • Stronger camera score: 72 vs 31
  • Stronger features score: 79 vs 52
  • 150% higher Front camera: 40 MP vs 16 MP

Display

Display comparison: OPPO K13 5G versus Samsung Galaxy S21 Ultra
SpecOPPO K13 5GSamsung Galaxy S21 Ultra
Screen size6.67 ″6.8 ″+2%
Panel typeAMOLEDLTPO AMOLED
Resolution2400x10803200x1440
Pixel density394 ppi515 ppi+31%
Refresh rate120 Hz120 Hz
Peak brightness1,200 nits1,500 nits+25%
Screen-to-body92.2 %—

Performance

Performance comparison: OPPO K13 5G versus Samsung Galaxy S21 Ultra
SpecOPPO K13 5GSamsung Galaxy S21 Ultra
ChipsetSnapdragon 6 Gen 4Samsung Exynos 2100
AnTuTu—783,817Bottom 22%
AnTuTu 11 (CPU)—263,424Bottom 17%
AnTuTu 11 (GPU)—126,989Bottom 33%
AnTuTu 11 (Memory)—165,563Bottom 35%
AnTuTu 11 (UX)—227,841Bottom 20%
Geekbench 6 (single)—1,430Top 46%
Geekbench 6 (multi)—3,550Bottom 50%
RAM (max)8 GB12 GB+50%
Storage options128GB / 256GB128GB / 256GB / 512GB
Storage typeUFS 3.1UFS 3.1

Camera

Camera comparison: OPPO K13 5G versus Samsung Galaxy S21 Ultra
SpecOPPO K13 5GSamsung Galaxy S21 Ultra
Main camera50 MP108 MP+116%
Main aperturef/1.8f/1.8
Ultra-wide—12 MP
Telephoto—10 MP
Optical zoom—10 x
Max video4K@30fps8K@24fps
Front camera16 MP40 MP+150%
OISNoYes

Battery

Battery comparison: OPPO K13 5G versus Samsung Galaxy S21 Ultra
SpecOPPO K13 5GSamsung Galaxy S21 Ultra
Capacity7,000 mAh+40%5,000 mAh
Wired charging80 W+220%25 W
Wireless charging—15 W

Design

Design comparison: OPPO K13 5G versus Samsung Galaxy S21 Ultra
SpecOPPO K13 5GSamsung Galaxy S21 Ultra
Weight208 g+9%228 g
Thickness8.5 mm+5%8.9 mm
IP ratingIP65IP68
Frame materialPlasticAluminum

Connectivity

Connectivity comparison: OPPO K13 5G versus Samsung Galaxy S21 Ultra
SpecOPPO K13 5GSamsung Galaxy S21 Ultra
5GYesYes
Wi-FiWi-Fi 6Wi-Fi 6E
Bluetooth5.25.2
NFCNoYes
USBUSB-CUSB-C 3.2
eSIMNoYes

Software

Software comparison: OPPO K13 5G versus Samsung Galaxy S21 Ultra
SpecOPPO K13 5GSamsung Galaxy S21 Ultra
OS at launchAndroid 15 (ColorOS 15)Android 11 (One UI 3.1)
OS update pledge2 years4 years+100%

Audio

Audio comparison: OPPO K13 5G versus Samsung Galaxy S21 Ultra
SpecOPPO K13 5GSamsung Galaxy S21 Ultra
Stereo speakersYesYes
3.5mm jackNoNo

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