Samsung Galaxy S21 Ultra vs OnePlus 15
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
OnePlus 15
Screen size: 6.78" / Resolution: 1272 x 2772 px / Main camera: 50 MP & 50 MP & 50 MP / Front camera: 32MP / RAM: 12GB, 16GB / Battery power: 7300 mAh / Has 5G support: ✔ / Internal storage: 256GB, 512GB, 1TB / SIM cards: 2 SIM
Key Differences
Samsung Galaxy S21 Ultra
OnePlus 15
How is Samsung Galaxy S21 Ultra better than OnePlus 15?
More megapixels main camera: 108 MP & 12 MP & 10 MP & 10 MP vs 50 MP & 50 MP & 50 MP
More megapixels front camera: 40MP vs 32MP
Has a larger display diagonal: 6.8" vs 6.78"
Better display resolution: 1440 x 3200 px vs 1272 x 2772 px
Narrower: 75.6 mm (2.98 inches) vs 76.7 mm (3.02 inches)
More color options: Phantom Black, Phantom Silver, Phantom Titanium, Phantom Navy, Phantom Brown, Navy vs Infinite Black, Ultra Violet, Sand Storm
Samsung Galaxy S21 Ultra
OnePlus 15
How is OnePlus 15 better than Samsung Galaxy S21 Ultra?
Bigger battery capacity: 7300 mAh vs 5000 mAh
Faster CPU speed: 2 x 4.6 GHz & 6 x 3.62 GHz vs 1 x 2.9 GHz & 3 x 2.8 GHz & 4 x 2.2 GHz
AnTuTu score is about 307% higher
More internal storage in max option: 256GB, 512GB, 1TB vs 128GB, 256GB, 512GB
Higher charging speed: 120W vs 25W
Lighter: 215 g (7.58 ounces) vs 229 g (8.08 ounces)
Shorter: 161.4 mm (6.35 inches) vs 165.1 mm (6.5 inches)
The phone is 3 years and 10 months newer
Size Comparison
Samsung Galaxy S21 Ultra
OnePlus 15
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"
6.78"
Height
161.4 mm
(6.35 inches)
Width
76.7 mm
(3.02 inches)
Thickness
8.1 mm
(0.32 inches)
Screen size
6.78"
Weight
215 g
(7.58 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
161.4 mm
(6.35 inches)
Width
76.7 mm
(3.02 inches)
Thickness
8.1 mm
(0.32 inches)
Screen size
6.78"
Weight
215 g
(7.58 ounces)
Expert Score
Score 4.3
Score 4.3
Samsung Galaxy S21 Ultra
OnePlus 15
Samsung Galaxy S21 Ultra
OnePlus 15
Score 4.3
Score 4.3
CNet
Samsung Galaxy S21 Ultra
OnePlus 15
TechRadar
Samsung Galaxy S21 Ultra
OnePlus 15
IGN
Samsung Galaxy S21 Ultra
OnePlus 15
Tom's Guide
Samsung Galaxy S21 Ultra
OnePlus 15
Tech Advisor
Samsung Galaxy S21 Ultra
OnePlus 15
PCMag
Samsung Galaxy S21 Ultra
OnePlus 15
The Verge
Samsung Galaxy S21 Ultra
OnePlus 15
Smartprix
Samsung Galaxy S21 Ultra
OnePlus 15
Vote for Your option
Samsung Galaxy S21 Ultra
Vote for Your option
OnePlus 15
Benchmarks
AnTuTu Score
Samsung Galaxy S21 Ultra
843,008
OnePlus 15
3,434,737 +307.44%
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
OnePlus 15
968,935 +317%
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
OnePlus 15
1,235,307 +381.87%
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
OnePlus 15
489,823 +200.49%
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
OnePlus 15
740,672 +287.35%
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
OnePlus 15
11,199 +235.4%
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
OnePlus 15
3,726 +179.31%
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
OnePlus 15
Charging timeTechnical Specifications
Show differences
Show differences
Specs
Samsung Galaxy S21 Ultra
OnePlus 15
Design
Weight
229 g (8.08 ounces)
215 g (7.58 ounces)
Thickness
8.9 mm (0.35 inches)
8.1 mm (0.32 inches)
Width
75.6 mm (2.98 inches)
76.7 mm (3.02 inches)
Height
165.1 mm (6.5 inches)
161.4 mm (6.35 inches)
Is weather-sealed (splashproof)
✔
-
Ingress Protection (IP) rating
IP68
IP69
Waterproof depth rating
1.5 m
1.5 m
Volume
111.09 cm³
100.27 cm³
Is dustproof and water-resistant
✔
-
Color options
Phantom Black, Phantom Silver, Phantom Titanium, Phantom Navy, Phantom Brown, Navy
Infinite Black, Ultra Violet, Sand Storm
French Repairability Index
8.2
-
Water resistance
-
Waterproof
Display
Screen size
6.8"
6.78"
Display type
OLED/AMOLED
OLED/AMOLED
Pixel density
515 ppi
450 ppi
Resolution
1440 x 3200 px
1272 x 2772 px
Refresh rate
120Hz
165Hz
Touch sampling rate
-
330Hz
Brightness (typical)
1500 nits
800 nits
Has branded damage-resistant glass
✔
✔
Gorilla Glass version
Gorilla Glass Victus
-
Supports HDR10
✔
✔
Supports HDR10+
✔
✔
Always-On Display
✔
✔
Supports Dolby Vision
-
✔
Contrast ratio
3000000:1
-
Has a curved display
✔
-
Has a touch screen
✔
✔
Performance
Internal storage
128GB, 256GB, 512GB
256GB, 512GB, 1TB
RAM
12GB, 16GB
12GB, 16GB
Android version
Android 14
Android 16
CPU speed
1 x 2.9 GHz & 3 x 2.8 GHz & 4 x 2.2 GHz
2 x 4.6 GHz & 6 x 3.62 GHz
GPU clock speed
-
1200 MHz
Has integrated LTE
✔
✔
RAM speed
3200 MHz
-
Semiconductor size
5 nm
-
Supports 64-bit
✔
-
DirectX version
DirectX 12
-
Has integrated graphics
✔
-
OpenGL ES version
3.2
-
Uses big.LITTLE technology
✔
-
CPU threads
8 threads
-
Uses HMP
✔
-
Has TrustZone
✔
-
Maximum memory bandwidth
51.2 GB/s
85.1 GB/s
OpenCL version
2
-
DDR memory version
5
-
Maximum memory amount
16GB
-
Thermal Design Power (TDP)
9W
-
Shading units
-
1536
Release date
2021
2025
GPU turbo
854 MHz
-
Has NX bit
✔
-
Memory channels
4
-
Cameras
Main camera
108 MP & 12 MP & 10 MP & 10 MP
50 MP & 50 MP & 50 MP
Front camera
40MP
32MP
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/1.8 & f/2 & f/2.8
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
3.5x
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
✔
✔
Can create panoramas in-camera
✔
✔
Wide aperture (front camera)
f/2.2
f/2.4
Has timelapse function
✔
✔
Supports Dolby Vision recording
-
✔
Minimum focal length
-
16 mm
Maximum focal length
-
85 mm
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
✔
-
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
✔
✔
Can block app tracking
-
✔
Has on-device machine learning
-
✔
Has Live Text
-
✔
Supports widgets
✔
-
More languages supported
125
-
Has offline voice recognition
✔
✔
The browser has word wrap
✔
-
Has voice commands
✔
✔
Has full-page screenshots
-
✔
Has PiP
-
✔
Has notification permissions
-
✔
Has media picker
-
✔
Battery
Battery power
5000 mAh
7300 mAh
Has wireless charging
✔
✔
Supports fast charging
✔
✔
Charging speed
25W
120W
Wireless charging speed
15W
50W
Has reverse wireless charging
✔
✔
Reverse wireless charging speed
4.5W
10W
Has a battery level indicator
✔
✔
Has a rechargeable battery
✔
✔
Battery life
35.5 hours
-
Comes with a charger
-
✔
Audio
Has stereo speakers
✔
✔
Has aptX HD
-
✔
Has aptX
✔
-
Number of microphones
2
-
Has aptX Adaptive
-
✔
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)
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
Has a fingerprint scanner
✔
✔
Bluetooth version
5.2
6
Has a gyroscope
✔
✔
Has GPS
✔
✔
Has a compass
✔
✔
Supports Wi-Fi
✔
✔
Has a cellular module
✔
✔
Has a barometer
✔
-
Supports Galileo
✔
✔
Has an infrared sensor
-
✔
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
Vote for Your option
OnePlus 15
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