Samsung Galaxy S21 Ultra vs Samsung Galaxy S25 Ultra
Short Description
Samsung Galaxy S21 Ultra
Screen size: 6.8" / Resolution: 1440 x 3200 px / Main camera: 108 MP & 12 MP & 10 MP & 10 MP / Front camera: 40MP / RAM: 12GB, 16GB / Battery power: 5000 mAh / Has 5G support: ✔ / Internal storage: 128GB, 256GB, 512GB / SIM cards: 1 SIM, 1 eSIM
Samsung Galaxy S25 Ultra
Screen size: 6.9" / Resolution: 1440 x 3120 px / Main camera: 200 MP & 50 MP & 10 MP & 10 MP / Front camera: 12MP / RAM: 12GB / Battery power: 5000 mAh / Has 5G support: ✔ / Internal storage: 1000GB / SIM cards: 2 SIM, 2 eSIM
Key Differences
Samsung Galaxy S21 Ultra
Samsung Galaxy S25 Ultra
How is Samsung Galaxy S21 Ultra better than Samsung Galaxy S25 Ultra?
More RAM memory capacity in max option: 12GB, 16GB vs 12GB
More megapixels front camera: 40MP vs 12MP
Better display resolution: 1440 x 3200 px vs 1440 x 3120 px
Narrower: 75.6 mm (2.98 inches) vs 77.6 mm (3.06 inches)
Samsung Galaxy S21 Ultra
Samsung Galaxy S25 Ultra
How is Samsung Galaxy S25 Ultra better than Samsung Galaxy S21 Ultra?
Faster CPU speed: 2 x 4.32 GHz & 6 x 3.53 GHz vs 1 x 2.9 GHz & 3 x 2.8 GHz & 4 x 2.2 GHz
AnTuTu score is about 169% higher
More internal storage in max option: 1000GB vs 128GB, 256GB, 512GB
More megapixels main camera: 200 MP & 50 MP & 10 MP & 10 MP vs 108 MP & 12 MP & 10 MP & 10 MP
Has a larger display diagonal: 6.9" vs 6.8"
Higher charging speed: 45W vs 25W
Lighter: 218 g (7.69 ounces) vs 229 g (8.08 ounces)
Shorter: 162.8 mm (6.41 inches) vs 165.1 mm (6.5 inches)
More color options: Titanium Silver Blue, Titanium Black, Titanium White Silver, Titanium Gray, Titanium Jade Green, Titanium Jet Black, Titanium Pink Gold vs Phantom Black, Phantom Silver, Phantom Titanium, Phantom Navy, Phantom Brown, Navy
The phone is 3 years and 2 months newer
Size Comparison
Samsung Galaxy S21 Ultra
Samsung Galaxy S25 Ultra
Height
165.1 mm
(6.5 inches)
Width
75.6 mm
(2.98 inches)
Thickness
8.9 mm
(0.35 inches)
Screen size
6.8"
Weight
229 g
(8.08 ounces)
6.8"
6.9"
Height
162.8 mm
(6.41 inches)
Width
77.6 mm
(3.06 inches)
Thickness
8.2 mm
(0.32 inches)
Screen size
6.9"
Weight
218 g
(7.69 ounces)
Height
165.1 mm
(6.5 inches)
Width
75.6 mm
(2.98 inches)
Thickness
8.9 mm
(0.35 inches)
Screen size
6.8"
Weight
229 g
(8.08 ounces)
Height
162.8 mm
(6.41 inches)
Width
77.6 mm
(3.06 inches)
Thickness
8.2 mm
(0.32 inches)
Screen size
6.9"
Weight
218 g
(7.69 ounces)
3D comparison
Samsung Galaxy S21 Ultra
Samsung Galaxy S25 Ultra
Samsung Galaxy S21 Ultra
Samsung Galaxy S25 Ultra
Vote for Your option
Samsung Galaxy S21 Ultra
Vote for Your option
Samsung Galaxy S25 Ultra
Benchmarks
AnTuTu Score
Samsung Galaxy S21 Ultra
843,008
Samsung Galaxy S25 Ultra
2,265,427 +168.73%
The score reflects a device's overall performance by summing up results from tests of RAM speed, CPU, and 2D/3D graphics.
CPU
Samsung Galaxy S21 Ultra
232,358
Samsung Galaxy S25 Ultra
586,044 +152.22%
Measures the performance of a device's processor, focusing on tasks such as computing power and multi-core efficiency.
GPU
Samsung Galaxy S21 Ultra
256,356
Samsung Galaxy S25 Ultra
916,344 +257.45%
Measures the graphical performance of a device's GPU, evaluating its ability to handle graphics-intensive tasks such as gaming and rendering.
Memory
Samsung Galaxy S21 Ultra
163,007
Samsung Galaxy S25 Ultra
436,052 +167.51%
Measures the performance of a device's memory (RAM), measuring its speed and efficiency in handling multitasking and data-intensive applications.
UX
Samsung Galaxy S21 Ultra
191,217
Samsung Galaxy S25 Ultra
326,987 +71%
Measures the overall user experience performance of a device, including factors like system responsiveness, touch sensitivity, and app launching speed.
Geekbench 6 · Multi-Core
Samsung Galaxy S21 Ultra
3,339
Samsung Galaxy S25 Ultra
9,846 +194.88%
Measures the aggregate performance of all processor cores in a device, simulating tasks optimized for multi-threaded processing.
Geekbench 6 · Single-Core
Samsung Galaxy S21 Ultra
1,334
Samsung Galaxy S25 Ultra
3,057 +129.16%
Measures the performance of a single processor core by assessing how efficiently the device handles single-threaded processing-based tasks.
Battery Performance
Samsung Galaxy S21 Ultra
Samsung Galaxy S25 Ultra
Charging timeComparison videos
70,000+ views
Samsung Galaxy S25 Ultra VS Samsung Galaxy S21 Ultra (Camera Comparison, PUBG & Display & Speed)
6,000+ views
Samsung Galaxy S25 ultra Vs Samsung Galaxy S21 Ultra
4,000+ views
Samsung Galaxy S25 Ultra Vs Samsung Galaxy S21 Ultra! (Comparison) (Review)
4,000+ views
Samsung Galaxy S25 Ultra Vs Samsung Galaxy S21 Ultra || Comparison
Technical Specifications
Show differences
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Specs
Samsung Galaxy S21 Ultra
Samsung Galaxy S25 Ultra
Design
Weight
229 g (8.08 ounces)
218 g (7.69 ounces)
Thickness
8.9 mm (0.35 inches)
8.2 mm (0.32 inches)
Width
75.6 mm (2.98 inches)
77.6 mm (3.06 inches)
Height
165.1 mm (6.5 inches)
162.8 mm (6.41 inches)
Is weather-sealed (splashproof)
✔
-
Ingress Protection (IP) rating
IP68
IP68
Waterproof depth rating
1.5 m
1.5 m
Volume
111.09 cm³
103.59 cm³
Is dustproof and water-resistant
✔
Water resistant
Color options
Phantom Black, Phantom Silver, Phantom Titanium, Phantom Navy, Phantom Brown, Navy
Titanium Silver Blue, Titanium Black, Titanium White Silver, Titanium Gray, Titanium Jade Green, Titanium Jet Black, Titanium Pink Gold
Lowest potential operating temperature
-
0 °C
Maximum operating temperature
-
35 °C
French Repairability Index
8.2
-
Display
Screen size
6.8"
6.9"
Display type
OLED/AMOLED
OLED/AMOLED
Pixel density
515 ppi
498 ppi
Resolution
1440 x 3200 px
1440 x 3120 px
Refresh rate
120Hz
120Hz
Touch sampling rate
-
240Hz
Brightness (typical)
1500 nits
-
Has branded damage-resistant glass
✔
✔
Gorilla Glass version
Gorilla Glass Victus
Gorilla Glass Armor 2
Supports HDR10
✔
✔
Supports HDR10+
✔
✔
Always-On Display
✔
✔
Contrast ratio
3000000:1
3000000:1
Has a curved display
✔
-
Has a touch screen
✔
✔
Performance
Internal storage
128GB, 256GB, 512GB
1000GB
RAM
12GB, 16GB
12GB
Android version
Android 14
Android 15
CPU speed
1 x 2.9 GHz & 3 x 2.8 GHz & 4 x 2.2 GHz
2 x 4.32 GHz & 6 x 3.53 GHz
GPU clock speed
-
1100 MHz
Has integrated LTE
✔
✔
RAM speed
3200 MHz
5300 MHz
Semiconductor size
5 nm
3 nm
Supports 64-bit
✔
✔
DirectX version
DirectX 12
DirectX 12
Has integrated graphics
✔
✔
OpenGL ES version
3.2
-
Uses big.LITTLE technology
✔
✔
CPU threads
8 threads
8 threads
Uses HMP
✔
✔
Has TrustZone
✔
✔
Maximum memory bandwidth
51.2 GB/s
10.68 GB/s
OpenCL version
2
3
L2 cache
-
12 MB
DDR memory version
5
5
Maximum memory amount
16GB
24GB
Uses multithreading
-
✔
Thermal Design Power (TDP)
9W
-
Shading units
-
1536
Release date
2021
2025
Has NX bit
✔
-
Memory channels
4
2
Supports ecc memory
-
✔
GPU turbo
854 MHz
-
Cameras
Main camera
108 MP & 12 MP & 10 MP & 10 MP
200 MP & 50 MP & 10 MP & 10 MP
Front camera
40MP
12MP
Has built-in optical image stabilization
✔
✔
Video recording (main camera)
4320 x 24 fps
4320 x 30 fps
Wide aperture (main camera)
f/1.8 & f/2.2 & f/4.9 & f/2.4
f/1.7 & f/3.4 & f/1.9 & f/2.4
Has a dual-tone LED flash
✔
✔
Has a BSI sensor
✔
✔
Has continuous autofocus when recording movies
✔
✔
Has phase-detection autofocus for photos
✔
✔
Supports slow-motion video recording
✔
✔
Has a built-in HDR mode
✔
✔
Has a flash
✔
✔
Has manual exposure
✔
✔
Has a dual-lens (or multi-lens) main camera
✔
✔
Optical zoom
10x
5x
Number of flash LEDs
2
2
Has a CMOS sensor
✔
✔
Has manual ISO
✔
✔
Has a serial shot mode
✔
✔
Has manual focus
✔
✔
Has a front camera
✔
✔
Has laser autofocus
✔
✔
Has manual white balance
✔
✔
Shoots raw
✔
✔
Has touch autofocus
✔
✔
Has manual shutter speed
-
✔
Can create panoramas in-camera
✔
✔
Wide aperture (front camera)
f/2.2
f/2.2
Has timelapse function
✔
✔
Pixel size (main camera)
-
0.6 µm & 0.7 µm & 0.7 µm & 1.12 µm
Supports HDR10 recording
-
✔
Operating system
Has clipboard warnings
✔
✔
Has location privacy options
✔
✔
Has camera/microphone privacy options
✔
✔
Has theme customization
✔
✔
Can play games while they download
✔
✔
Has dark mode
✔
✔
Has Wi-Fi password sharing
✔
✔
Has battery health check
✔
✔
Has an extra dim mode
✔
✔
Has focus modes
✔
✔
Has dynamic theming
✔
✔
Can offload apps
✔
✔
Has customizable notifications
✔
✔
Has scrolling screenshots
✔
✔
Supports split screen
✔
✔
Supports instant markup
✔
✔
Supports PiP and PaP
✔
✔
More languages supported
-
125
Can be used as a PC
✔
✔
Has sharing intents
✔
✔
Has a child lock
✔
✔
Supports widgets
-
✔
Is free and open source
✔
✔
Tracks the current position of a mobile device
✔
✔
Is a multi-user system
✔
✔
Supports widgets
✔
-
More languages supported
125
-
Has offline voice recognition
✔
✔
The browser has word wrap
✔
✔
Has voice commands
✔
✔
Battery
Battery power
5000 mAh
5000 mAh
Has wireless charging
✔
✔
Supports fast charging
✔
✔
Charging speed
25W
45W
Wireless charging speed
15W
25W
Has reverse wireless charging
✔
✔
Reverse wireless charging speed
4.5W
4.5W
Has an ultra power-saving mode
-
✔
Has a battery level indicator
✔
✔
Has a rechargeable battery
✔
✔
Battery life
35.5 hours
-
Audio
Has stereo speakers
✔
✔
Has LDAC
-
✔
Has aptX HD
-
✔
Has aptX Lossless
-
✔
Has aptX
✔
-
Number of microphones
2
3
Features
Has 5G support
✔
✔
Wi-Fi version
Wi-Fi 6E (802.11ax), Wi-Fi 6 (802.11ax), Wi-Fi 5 (802.11ac), Wi-Fi 4 (802.11n)
Wi-Fi 4 (802.11n), Wi-Fi 6 (802.11ax), Wi-Fi 5 (802.11ac), Wi-Fi 7 (802.11be), Wi-Fi 6E (802.11ax)
Download speed
3000 MBits/s
10000 MBits/s
Upload speed
422 MBits/s
3500 MBits/s
Has USB Type-C
✔
✔
USB version
3.2
3.2
Has NFC
✔
✔
SIM cards
1 SIM, 1 eSIM
2 SIM, 2 eSIM
Has a fingerprint scanner
✔
✔
Bluetooth version
5.2
5.4
Has a gyroscope
✔
✔
Has GPS
✔
✔
Has a compass
✔
✔
Supports Wi-Fi
✔
✔
Has a cellular module
✔
✔
Has a barometer
✔
✔
Stylus included
-
✔
Supports Galileo
✔
✔
Has an accelerometer
✔
✔
Supports ant+
✔
✔
Head SAR (eu)
0.71W/kg
-
Disclaimer! NFC, GSM network support, and some other specs can be different depending on the country.
Vote for Your option
Samsung Galaxy S21 Ultra
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Samsung Galaxy S25 Ultra
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