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Galaxy A55 vs Galaxy S21 Ultra 5G

Samsung Galaxy A55 vs Samsung Galaxy S21 Ultra 5G

What Galaxy A55 does better (4) and where Galaxy S21 Ultra 5G wins (20) — every spec side by side.

Samsung · 2024Galaxy A55

8.1Score

4 advantages≈ $270

Samsung · 2021Galaxy S21 Ultra 5G

9.0Score

20 advantages≈ $260

Higher score

7.4Display9.1

6.3Performance6.7

8.4Camera9.8

5.0Battery6.2

8.5Features9.4

Dimensions

Size comparison

Galaxy A55Galaxy S21 Ultra 5G

	Galaxy A55	Galaxy S21 Ultra 5G	Difference
Height	161.1 mm	165.1 mm	−4 mm
Width	77.4 mm	75.6 mm	+1.8 mm
Thickness	8.2 mm	8.9 mm	−0.7 mm
Weight	213 g	227 g	−14 g

Drawn to the same scale from the official dimensions (front and side).

Why is Galaxy A55 better than Galaxy S21 Ultra 5G?

Memory card slotYes · Galaxy S21 Ultra 5G: No
Weight213 g vs 227 g+7%
Process4 nm vs 5 nm+25%
Thickness8.2 mm vs 8.9 mm+9%

Why is Galaxy S21 Ultra 5G better than Galaxy A55?

Main camera50 MP vs 108 MP2.2×
Storage (max)256 GB vs 512 GB2×
Telephoto cameraNo · Galaxy A55: Yes
Wireless chargingNo · Galaxy A55: Yes
RAM12 GB vs 16 GB+33%
AnTuTu score635,598 vs 657,150+3%
Peak brightness1,000 nits vs 1,500 nits+50%
Geekbench 6 (multi-core)3,259 vs 3,518+8%
Pixel density390 ppi vs 515 ppi+32%
Rear cameras2 vs 42×
Max video4K vs 8K
4K video frame rate30 fps vs 60 fps2×

Specifications

Side by side

Only differences	Samsung Galaxy A55≈ $2708.1	Samsung Galaxy S21 Ultra 5G≈ $2609.0
Design
Weight	213 g	227 g
Thickness	8.2 mm	8.9 mm
Height	161.1 mm	165.1 mm
Width	77.4 mm	75.6 mm
Frame	Aluminium	Aluminium
Back	Glass	Glass
Ingress protection	IP67	IP68
Water resistance (IPx)	IPx7	IPx8
Glass protection	Corning Gorilla Glass Victus+	Corning Gorilla Glass Victus
Colours	Iceblue, Lilac, Navy, Lemon	Phantom Black, Phantom Silver, Phantom Titanium, Phantom Navy, Phantom Brown, Navy
Stylus	—	Yes
Display
Screen size	6.6″	6.8″
Panel	Super AMOLED	Dynamic AMOLED 2X
OLED panel	Yes	Yes
Resolution (width)	1,080 px	1,440 px
Resolution (height)	2,340 px	3,200 px
Pixel density	390 ppi	515 ppi
Refresh rate	120 Hz	120 Hz
Peak brightness	1,000 nits	1,500 nits
Measured brightness	1,010 nits	1,023 nits
Screen-to-body ratio	85.8%	89.8%
HDR	Yes	Yes
Performance
Chipset	Exynos 1480	Exynos 2100 - International
Chip maker	Exynos	Qualcomm
Process	4 nm	5 nm
CPU cores	8	8
CPU frequency	2.75 GHz	2.9 GHz
GPU	Xclipse 530	Mali-G78 MP14 - International Adreno 660 - USA/China
AnTuTu score	635,598	657,150
Geekbench 6 (multi-core)	3,259	3,518
3DMark Wild Life Extreme	1,024	—
Memory
RAM	12 GB	16 GB
Storage (max)	256 GB	512 GB
Storage (base)	128 GB	128 GB
Storage type	UFS 3.1	UFS 3.1
Memory card slot	Yes	No
Camera
Main camera	50 MP	108 MP
Main camera aperture	f/1.8	f/1.8
Main sensor size	1/1.56"	1/1.33"
Rear cameras	2	4
Optical stabilisation	Yes	Yes
Ultra-wide camera	Yes	Yes
Telephoto camera	No	Yes
Optical zoom	—	10×
Max video	4K	8K
4K video frame rate	30 fps	60 fps
Selfie camera	32 MP	40 MP
4K selfie video	Yes	Yes
Battery
Battery capacity	5,000 mAh	5,000 mAh
Battery type	Li-Ion	Li-Ion
Active use (test)	13.4 h	—
Wired charging	25 W	25 W
Charged in 30 min	55%	54%
Wireless charging	No	Yes
Wireless charging power	—	15 W
Reverse wireless charging	—	Yes
Connectivity
5G	Yes	Yes
eSIM	Yes	Yes
Dual SIM	Yes	Yes
Wi-Fi standard	Wi-Fi 6	Wi-Fi 6E
Bluetooth	5.3	5.2
NFC	Yes	Yes
USB	USB Type-C 2.0	USB Type-C 3.2
USB version	2	3.2
Ultra Wideband	—	Yes
Satellite navigation	GLONASS, GALILEO, BDS, QZSS	GLONASS, GALILEO, BDS
Features
Stereo speakers	Yes	Yes
3.5 mm headphone jack	No	No
Loudspeaker loudness	-25.7 LUFS	-25.5 LUFS
Fingerprint sensor	Under display	Under display, ultrasonic
Barometer	Yes	Yes
Sensors	Fingerprint (under display, optical), accelerometer, gyro, compass	Fingerprint (under display, ultrasonic), accelerometer, gyro, proximity, compass, barometer
SAR (head)	0.68 W/kg	0.71 W/kg
Software
OS at launch	Android 14	Android 11
Platform	Android	Android
Interface	One UI 8.5	One UI 7
Major OS updates promised	4	4