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InnoReviews

POCO X3 Pro vs Samsung Galaxy S21 Ultra

X

Xiaomi

POCO X3 Pro

$249

42.2Inno Score
VS
WINNER
S
53.9Inno Score
32.2Performance37.2
60.2Display56.3
31.3Camera72
49.4Battery46.4
44Features78.7
6 spec wins — POCO X3 Pro16 spec wins — Samsung Galaxy S21 Ultra

InnoReviews verdict

Samsung Galaxy S21 Ultra wins this phone face-off, 53.9 to 42.2, pulling ahead mainly in camera (+41) and features (+35). POCO X3 Pro still makes sense if its price or standout specs fit your needs better.

Which would you pick?

Key differences

Reasons to pick the POCO X3 Pro

  • Stronger display score: 60 vs 56
  • Stronger battery score: 49 vs 46
  • 32% higher Wired charging: 33 W vs 25 W
  • 12% higher AnTuTu 10 (CPU): 294,736 vs 263,424
  • Has 3.5mm jack — the other doesn't
  • Lower launch price: $249 vs $1,199

Reasons to pick the Samsung Galaxy S21 Ultra

  • Stronger performance score: 37 vs 32
  • Stronger camera score: 72 vs 31
  • Stronger features score: 79 vs 44
  • 125% higher Main camera: 108 MP vs 48 MP
  • 100% higher Front camera: 40 MP vs 20 MP

Display

Display comparison: POCO X3 Pro versus Samsung Galaxy S21 Ultra
SpecPOCO X3 ProSamsung Galaxy S21 Ultra
Screen size6.67 ″6.8 ″+2%
Panel typeIPS LCDLTPO AMOLED
Resolution2400x10803200x1440
Pixel density395 ppi515 ppi+30%
Refresh rate120 Hz120 Hz
Peak brightness—1,500 nits
AnTuTu 10 (CPU)294,736+12%Top 79%263,424Top 88%
AnTuTu 10 (GPU)118,830Top 85%126,989+7%Top 82%
AnTuTu 10 (Memory)160,316Top 82%165,563+3%Top 72%
AnTuTu 10 (UX)221,452Top 91%227,841+3%Top 82%

Performance

Performance comparison: POCO X3 Pro versus Samsung Galaxy S21 Ultra
SpecPOCO X3 ProSamsung Galaxy S21 Ultra
ChipsetSnapdragon 860Samsung Exynos 2100
AnTuTu 10795,334+1%Top 62%783,817Top 65%
Geekbench 6 (single)870Top 79%1,430+64%Top 52%
Geekbench 6 (multi)2,900Top 66%3,550+22%Top 56%
RAM (max)8 GB12 GB+50%
Storage options128GB / 256GB128GB / 256GB / 512GB
Storage typeUFS 3.1UFS 3.1

Camera

Camera comparison: POCO X3 Pro versus Samsung Galaxy S21 Ultra
SpecPOCO X3 ProSamsung Galaxy S21 Ultra
Main camera48 MP108 MP+125%
Main aperturef/1.8f/1.8
Ultra-wide8 MP12 MP+50%
Telephoto—10 MP
Optical zoom—10 x
Max video4K@30fps8K@24fps
Front camera20 MP40 MP+100%
OISNoYes

Battery

Battery comparison: POCO X3 Pro versus Samsung Galaxy S21 Ultra
SpecPOCO X3 ProSamsung Galaxy S21 Ultra
Capacity5,160 mAh+3%5,000 mAh
Wired charging33 W+32%25 W
Wireless charging—15 W

Design

Design comparison: POCO X3 Pro versus Samsung Galaxy S21 Ultra
SpecPOCO X3 ProSamsung Galaxy S21 Ultra
Weight215 g+6%228 g
Thickness9.4 mm8.9 mm+5%
IP ratingIP53IP68
Frame materialPlasticAluminum

Connectivity

Connectivity comparison: POCO X3 Pro versus Samsung Galaxy S21 Ultra
SpecPOCO X3 ProSamsung Galaxy S21 Ultra
5GNoYes
Wi-FiWi-Fi 5Wi-Fi 6E
Bluetooth5.05.2
NFCYesYes
USBUSB-C 2.0USB-C 3.2
eSIMNoYes

Software

Software comparison: POCO X3 Pro versus Samsung Galaxy S21 Ultra
SpecPOCO X3 ProSamsung Galaxy S21 Ultra
OS at launchAndroid 11 (MIUI 12)Android 11 (One UI 3.1)
OS update pledge2 years4 years+100%

Audio

Audio comparison: POCO X3 Pro versus Samsung Galaxy S21 Ultra
SpecPOCO X3 ProSamsung Galaxy S21 Ultra
Stereo speakersYesYes
3.5mm jackYesNo

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