Samsung Galaxy Z Fold 2 vs S21 Ultra

67 out of 100

76 out of 100

Here we compared two flagship smartphones: the 7.6-inch Samsung Galaxy Z Fold 2 (with Qualcomm Snapdragon 865 Plus) that was released on August 5, 2020, against the Samsung Galaxy S21 Ultra, which is powered by Exynos 2100 and came out 5 months after. 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 (1)

Key differences

An overview of the main advantages of each smartphone

Reasons to consider the Samsung Galaxy Z Fold 2

Has a 0.8 inch larger screen size

Reasons to consider the Samsung Galaxy S21 Ultra

Waterproof body (IP68 classification)
The rear camera has a 10x optical zoom
Shows 23% longer battery life (31:14 vs 25:18 hours)
38% higher pixel density (515 vs 373 PPI)
Delivers 42% higher peak brightness (1023 against 718 nits)
Newer Bluetooth version (v5.2)
Comes with 500 mAh larger battery capacity: 5000 vs 4500 mAh
More recent OS version: Android 13 versus 12
Has 2 SIM card slots
Better grip in hands – the body is 52.6 mm narrower

Review

Evaluation of Samsung Galaxy Z Fold 2 and S21 Ultra crucial features

Display

Screen quality, color accuracy, brightness

Type	Dynamic AMOLED	Dynamic AMOLED
Size	7.6 inches	6.8 inches
Resolution	1768 x 2208 pixels	1440 x 3200 pixels
Aspect ratio	22.5:18	20:9
PPI	373 ppi	515 ppi
Refresh rate	120 Hz	120 Hz
Adaptive refresh rate	Yes	Yes
Max rated brightness	700 nits	1500 nits
HDR support	Yes, HDR10+	Yes, HDR10+
Screen protection	Gorilla Glass Victus	Gorilla Glass Victus
Screen-to-body ratio	89.1%	89.8%
Display features	- DCI-P3 - Always-On Display	- DCI-P3 - Always-On Display

RGB color space	99.9%	-
PWM	219 Hz	-
Response time	8 ms	-
Contrast	∞ Infinity	-

Height	159.2 mm (6.27 inches)	165.1 mm (6.5 inches)
Width	128.2 mm (5.05 inches)	75.6 mm (2.98 inches)
Thickness	6.9 mm (0.27 inches)	8.9 mm (0.35 inches)
Weight	279 g (9.84 oz)	227 g (8.01 oz)
Waterproof	No	IP68
Rear material	Glass	Glass
Frame material	Metal	Metal
Colors	Black, Brown	Black, Silver, Gray, Blue
Fingerprint scanner	Yes, in-button	Yes, in-display

Chipset	Qualcomm Snapdragon 865 Plus	Samsung Exynos 2100
Max clock	3100 MHz	2840 MHz
CPU cores	8 (1 + 3 + 4)	8 (1 + 3 + 4)
Architecture	- 4 cores at 1.8 GHz: Kryo 585 Silver (Cortex-A55) - 3 cores at 2.42 GHz: Kryo 585 Gold (Cortex-A77) - 1 core at 3.1 GHz: Kryo 585 Prime (Cortex-A77)	- 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	4 MB	-
Lithography process	7 nanometers	5 nanometers
Graphics	Adreno 650	Mali-G78 MP14
GPU shading units	1024	896
GPU clock	670 MHz	854 MHz
FLOPS	~1372.1 GFLOPS	~1530.4 GFLOPS

CPU	221662	236566
GPU	240763	255535
Memory	144925	157504
UX	173027	183564
Total score	783404	833650

Max surface temperature	42.9 °C	40.8 °C
Stability	82%	69%
Graphics test	25 FPS	31 FPS
Graphics score	4180	5221

Web score	9943	-
Video editing	7171	-
Photo editing	29482	-
Data manipulation	9931	-
Writing score	12906	-

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

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

Operating system	Android 10 (Can be upgraded to Android 12)	Android 11 (Can be upgraded to Android 13)
ROM	One UI 4.1.1	One UI 5.1
OS size	35.4 GB	26.4 GB

Capacity	4500 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 (30% in 30 min)	Yes (54% in 30 min)
Full charging time	1:55 hr	1:11 hr

Battery life tests
Web browsing	08:02 hr	10:13 hr
Watching video	10:45 hr	15:32 hr
Gaming	04:29 hr	05:26 hr
Standby	92 hr	98 hr

Main camera
Matrix	12 megapixels	108 megapixels
Image resolution	4000 x 3000	12000 x 9000
Zoom	Optical, 2x	Optical, 10x
Flash	Dual LED	Dual LED
Stabilization	Optical	Optical
8K video recording	No	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 (12 MP + 12 MP + 12 MP)	4 (108 MP + 10 MP + 10 MP + 12 MP)
Wide (main) lens	- 12 MP - Aperture: f/1.8 - Focal length: 26 mm - Pixel size: 1.8 micron - Sensor: 1/1.76", Samsung S5K2LD (ISOCELL 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: 1/3.6" (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 - Pixel size: 1.12 micron - Sensor: 1/3.1" (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 - RAW support	- Bokeh mode - Pro mode - RAW support
Samples	-	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/2.2	f/2.2
Focal length	26 mm	26 mm
Pixel size	1.22 microns	0.7 microns
Sensor type	CMOS	ISOCELL CMOS
Sensor size	1/3.2"	1/2.65"
Video resolution	2160p (4K) at 30 FPS	2160p (4K) at 60 FPS

Wi-Fi standard	Wi-Fi 6 (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 Direct - Wi-Fi Hotspot - Wi-Fi Display	- Dual Band - Wi-Fi MiMO - Wi-Fi Direct - Wi-Fi Hotspot - Wi-Fi Display
Bluetooth version	5.1	5.2
Bluetooth features	PBAP/PAB, PAN, OPP, MAP, LE, HSP, HID, HFP, DIP, AVRCP, A2DP	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 *	1	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 2020	January 2021
Release date	September 2020	February 2021
SAR (head)	0.291 W/kg	0.71 W/kg
SAR (body)	1.453 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

Samsung Galaxy Z Fold 2 vs S21 Ultra

Samsung Galaxy Z Fold 2 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