Samsung Galaxy Z Fold 4 vs S21 Ultra

79 out of 100

76 out of 100

Here we compared two flagship smartphones: the 7.6-inch Samsung Galaxy Z Fold 4 (with Qualcomm Snapdragon 8 Plus Gen 1) that was released on August 10, 2022, against the Samsung Galaxy S21 Ultra, which is powered by Exynos 2100 and came out 19 months before. On this page, you will find tests, full specs, strengths, and weaknesses of each of the devices.

Differences
Review
Specs
Benchmarks
Battery life
Camera
Comments

Key differences

An overview of the main advantages of each smartphone

Reasons to consider the Samsung Galaxy Z Fold 4

Has a 0.8 inch larger screen size
43% better performance in AnTuTu Benchmark (1188K versus 833K)
Better camera quality (According to DxOMark rating)
The phone is 1-year and 7-months newer
14% faster in single-core GeekBench 6 test: 1669 and 1458 points

Reasons to consider the Samsung Galaxy S21 Ultra

The rear camera has a 10x optical zoom
Waterproof body (IP68 classification)
38% higher pixel density (515 vs 374 PPI)
Shows 7% longer battery life (31:14 vs 29:16 hours)
Comes with 600 mAh larger battery capacity: 5000 vs 4400 mAh
Better grip in hands – the body is 54.5 mm narrower
Weighs 36 grams less

Review

Evaluation of Samsung Galaxy Z Fold 4 and S21 Ultra crucial features

Display

Screen quality, color accuracy, brightness

Type	Dynamic AMOLED	Dynamic AMOLED
Size	7.6 inches	6.8 inches
Resolution	1812 x 2176 pixels	1440 x 3200 pixels
Aspect ratio	10.8:9	20:9
PPI	374 ppi	515 ppi
Refresh rate	120 Hz	120 Hz
Adaptive refresh rate	Yes	Yes
Max rated brightness	500 nits	1500 nits
Max rated brightness in HDR	1200 nits	-
HDR support	Yes, HDR10+	Yes, HDR10+
Screen protection	Gorilla Glass Victus Plus	Gorilla Glass Victus
Screen-to-body ratio	90.9%	89.8%
Display features	- DCI-P3 - Always-On Display	- DCI-P3 - Always-On Display

RGB color space	95.5%	-
PWM	120 Hz	-
Response time	1 ms	-
Contrast	∞ Infinity	-

Height	155.1 mm (6.11 inches)	165.1 mm (6.5 inches)
Width	130.1 mm (5.12 inches)	75.6 mm (2.98 inches)
Thickness	6.3 mm (0.25 inches)	8.9 mm (0.35 inches)
Weight	263 g (9.28 oz)	227 g (8.01 oz)
Waterproof	IPX8	IP68
Rear material	Glass	Glass
Frame material	Metal	Metal
Colors	Black, Green, Burgundy	Black, Silver, Gray, Blue
Fingerprint scanner	Yes, in-button	Yes, in-display

Chipset	Qualcomm Snapdragon 8 Plus Gen 1	Samsung Exynos 2100
Max clock	3190 MHz	2840 MHz
CPU cores	8 (1 + 3 + 4)	8 (1 + 3 + 4)
Architecture	- 4 cores at 2 GHz: Cortex-A510 - 3 cores at 2.75 GHz: Cortex-A710 - 1 core at 3.2 GHz: Cortex-X2	- 4 cores at 2.2 GHz: Cortex-A55 - 3 cores at 2.81 GHz: Cortex-A78 - 1 core at 2.91 GHz: Cortex-X1
L3 cache	6 MB	-
Lithography process	4 nanometers	5 nanometers
Graphics	Adreno 730	Mali-G78 MP14
GPU shading units	1536	896
GPU clock	900 MHz	854 MHz
FLOPS	~2764.8 GFLOPS	~1530.4 GFLOPS

CPU	317066	236566
GPU	417945	255535
Memory	210433	157504
UX	242824	183564
Total score	1188589	833650

Max surface temperature	36.5 °C	40.8 °C
Stability	62%	69%
Graphics test	57 FPS	31 FPS
Graphics score	9650	5221

Web score	11671	-
Video editing	7375	-
Photo editing	32335	-
Data manipulation	11170	-
Writing score	16885	-

RAM size	12 GB	12, 16 GB
Memory type	LPDDR5	LPDDR5
Memory clock	3200 MHz	2750 MHz
Channels	4	2

Storage size	256, 512, 1024 GB	128, 256, 512 GB
Storage type	UFS 3.1	UFS 3.1
Memory card	No	No

Operating system	Android 12 (Can be upgraded to Android 13)	Android 11 (Can be upgraded to Android 13)
ROM	One UI 5.1.1	One UI 5.1
OS size	-	26.4 GB

Capacity	4400 mAh	5000 mAh
Max charge power	25 W	25 W
Battery type	Li-Po	Li-Ion
Replaceable	No	No
Wireless charging	Yes (11 W)	Yes (15 W)
Reverse charging	Yes, (wireless)	Yes, (wireless)
Fast charging	Yes (50% in 30 min)	Yes (54% in 30 min)
Full charging time	1:19 hr	1:11 hr

Battery life tests
Web browsing	09:26 hr	10:13 hr
Watching video	13:32 hr	15:32 hr
Gaming	04:32 hr	05:26 hr
Standby	101 hr	98 hr

Main camera
Matrix	50 megapixels	108 megapixels
Image resolution	8160 x 6120	12000 x 9000
Zoom	Optical, 3x	Optical, 10x
Flash	LED	Dual LED
Stabilization	Optical	Optical
8K video recording	Up to 24FPS	Up to 24FPS
4K video recording	Up to 60FPS	Up to 60FPS
1080p video recording	Up to 60FPS	Up to 60FPS
Slow motion	960 FPS (720p)	960 FPS (720p)
Angle of widest lens	123°	120°
Lenses	3 (50 MP + 12 MP + 12 MP)	4 (108 MP + 10 MP + 10 MP + 12 MP)
Wide (main) lens	- 50 MP - Aperture: f/1.8 - Pixel size: 1 micron - Sensor: 1/1.56", Samsung GN3 (ISOCELL Plus CMOS) - Phase autofocus (Dual Pixel) - Optical stabilization	- 108 MP - Aperture: f/1.8 - Focal length: 26 mm - Pixel size: 0.8 micron - Sensor: 1/1.33", Samsung S5KHM3 (ISOCELL Plus CMOS) - Laser autofocus - Optical stabilization
Telephoto lens	- 12 MP - Aperture: f/2.4 - Focal length: 52 mm - Pixel size: 1 micron - Sensor: 1/3.94", Samsung S5K3K1 (ISOCELL CMOS) - Phase autofocus - Optical stabilization	- 10 MP - Aperture: f/4.9 - Focal length: 240 mm - Pixel size: 1.22 micron - Sensor: 1/2.65", Samsung S5K3J1 (ISOCELL CMOS) - Phase autofocus (Dual Pixel) - Optical stabilization
Ultra-wide lens	- 12 MP - Aperture: f/2.2 - Focal length: 12 mm - Pixel size: 1.12 micron - Sensor: 1/3.06", Sony IMX258 (Exmor-RS CMOS)	- 12 MP - Aperture: f/2.2 - Focal length: 13 mm - Pixel size: 1.4 micron - Sensor: 1/2.55", Sony IMX563 (Exmor-RS CMOS) - Phase autofocus (Dual Pixel)
Camera features	- Bokeh mode - Pro mode	- Bokeh mode - Pro mode - RAW support
Samples	Photo samples of Samsung Galaxy Z Fold 4 from DxOMark	Photo samples of Samsung Galaxy S21 Ultra from DxOMark

Selfie camera
Megapixels	10 megapixels	40 megapixels
Image resolution	3648 x 2736	7864 x 5200
Aperture	f/1.8	f/2.2
Focal length	-	26 mm
Pixel size	-	0.7 microns
Sensor type	-	ISOCELL CMOS
Sensor size	-	1/2.65"
Video resolution	2160p (4K) at 60 FPS	2160p (4K) at 60 FPS

Wi-Fi standard	Wi-Fi 6E (802.11 a/b/g/n/ac/ax)	Wi-Fi 6E (802.11 a/b/g/n/ac/ax)
Wi-Fi features	- Dual Band - Wi-Fi MiMO - Wi-Fi Direct - Wi-Fi Hotspot - Wi-Fi Display	- Dual Band - Wi-Fi MiMO - Wi-Fi Direct - Wi-Fi Hotspot - Wi-Fi Display
Bluetooth version	5.2	5.2
Bluetooth features	LE	LE, A2DP
USB type	USB Type-C	USB Type-C
USB version	3.2	3.2
USB features	- Charging - USB-Storage mode - OTG	- Charging - USB-Storage mode - USB-Host mode - OTG
GPS	GPS, GLONASS, Beidou, Galileo	GPS, GLONASS, Beidou, Galileo
NFC *	Yes	Yes
Infrared port	No	No

Number of SIM *	2	2
Type of SIM card	Nano	Nano
Multi SIM mode	Standby	Standby
eSIM support *	Yes	Yes
Hybrid slot	No	No
LTE Cat *	20	24
5G support	Yes	Yes

Speakers	Stereo	Stereo
Headphone audio jack	No	No
FM radio	No	No
Dolby Atmos	Yes	Yes

Category	Flagship	Flagship
Announced	August 2022	January 2021
Release date	August 2022	February 2021
SAR (head)	1.3 W/kg	0.71 W/kg
SAR (body)	1.51 W/kg	1.58 W/kg
Sensors	- Hall-effect sensor - Barometer - Proximity sensor - Gyroscope - Accelerometer - Ambient light sensor - Compass - Fingerprint	- Hall-effect sensor - Barometer - Proximity sensor - Gyroscope - Accelerometer - Ambient light sensor - Compass - Fingerprint
Bundled charger	Not included	-

Samsung Galaxy Z Fold 4 vs S21 Ultra

Samsung Galaxy Z Fold 4 vs S21 Ultra

Key differences

Review

Value for money

Tests and specifications

Display

Design and build

Performance

Benchmarks

Memory

Software

Battery

Camera

DxOMark camera tests

Connectivity

Sound

Other

Conclusion