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InnoReviews

ASUS Zenfone 9 vs Samsung Galaxy S21 Ultra

ASUS Zenfone 9
46.1Inno Score
VS
WINNER
S
53.9Inno Score
45.8Performance37.2
49.3Display56.3
42.6Camera72
39.8Battery46.4
60Features78.7
6 spec wins — ASUS Zenfone 910 spec wins — Samsung Galaxy S21 Ultra

InnoReviews verdict

Samsung Galaxy S21 Ultra wins this phone face-off, 53.9 to 46.1, pulling ahead mainly in camera (+29) and features (+19). ASUS Zenfone 9 still makes sense if its price or standout specs fit your needs better.

Which would you pick?

Key differences

Reasons to pick the ASUS Zenfone 9

  • Stronger performance score: 46 vs 37
  • 66% higher AnTuTu 10: 1,300,000 vs 783,817
  • 30% higher Geekbench 6 (multi): 4,600 vs 3,550
  • 26% higher Geekbench 6 (single): 1,800 vs 1,430
  • 26% lower weight: 169 g vs 228 g
  • Lower launch price: $699 vs $1,199

Reasons to pick the Samsung Galaxy S21 Ultra

  • Stronger display score: 56 vs 49
  • Stronger camera score: 72 vs 43
  • Stronger battery score: 46 vs 40
  • Stronger features score: 79 vs 60
  • 233% higher Front camera: 40 MP vs 12 MP

Display

Display comparison: ASUS Zenfone 9 versus Samsung Galaxy S21 Ultra
SpecASUS Zenfone 9Samsung Galaxy S21 Ultra
Screen size5.9 ″6.8 ″+15%
Panel typeAMOLEDLTPO AMOLED
Resolution2400x10803200x1440
Pixel density445 ppi515 ppi+16%
Refresh rate120 Hz120 Hz
Peak brightness1,100 nits1,500 nits+36%
AnTuTu 10 (CPU)—263,424Top 88%
AnTuTu 10 (GPU)—126,989Top 82%
AnTuTu 10 (Memory)—165,563Top 72%
AnTuTu 10 (UX)—227,841Top 82%

Performance

Performance comparison: ASUS Zenfone 9 versus Samsung Galaxy S21 Ultra
SpecASUS Zenfone 9Samsung Galaxy S21 Ultra
ChipsetSnapdragon 8+ Gen 1Samsung Exynos 2100
AnTuTu 101,300,000+66%Top 31%783,817Top 65%
Geekbench 6 (single)1,800+26%Top 40%1,430Top 52%
Geekbench 6 (multi)4,600+30%Top 40%3,550Top 56%
RAM (max)8 GB12 GB+50%
Storage options128GB / 256GB128GB / 256GB / 512GB
Storage typeUFS 3.1UFS 3.1

Camera

Camera comparison: ASUS Zenfone 9 versus Samsung Galaxy S21 Ultra
SpecASUS Zenfone 9Samsung Galaxy S21 Ultra
Main camera50 MP108 MP+116%
Main aperturef/1.9f/1.8
Ultra-wide12 MP12 MP
Telephoto—10 MP
Optical zoom—10 x
Max video8K@24fps8K@24fps
Front camera12 MP40 MP+233%
OISYesYes

Battery

Battery comparison: ASUS Zenfone 9 versus Samsung Galaxy S21 Ultra
SpecASUS Zenfone 9Samsung Galaxy S21 Ultra
Capacity4,300 mAh5,000 mAh+16%
Wired charging30 W+20%25 W
Wireless charging—15 W

Design

Design comparison: ASUS Zenfone 9 versus Samsung Galaxy S21 Ultra
SpecASUS Zenfone 9Samsung Galaxy S21 Ultra
Weight169 g+26%228 g
Thickness9.1 mm8.9 mm+2%
IP ratingIP68IP68
Frame materialAluminumAluminum

Connectivity

Connectivity comparison: ASUS Zenfone 9 versus Samsung Galaxy S21 Ultra
SpecASUS Zenfone 9Samsung Galaxy S21 Ultra
5GYesYes
Wi-FiWi-Fi 6EWi-Fi 6E
Bluetooth5.25.2
NFCYesYes
USBUSB-C 2.0USB-C 3.2
eSIMNoYes

Software

Software comparison: ASUS Zenfone 9 versus Samsung Galaxy S21 Ultra
SpecASUS Zenfone 9Samsung Galaxy S21 Ultra
OS at launchAndroid 12 (ZenUI)Android 11 (One UI 3.1)
OS update pledge2 years4 years+100%

Audio

Audio comparison: ASUS Zenfone 9 versus Samsung Galaxy S21 Ultra
SpecASUS Zenfone 9Samsung Galaxy S21 Ultra
Stereo speakersYesYes
3.5mm jackYesNo

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