Home Phone comparison Samsung Galaxy S24 (Exynos) and Samsung Galaxy S21 Ultra - Which is better?

Samsung Galaxy S24 (Exynos) vs Samsung Galaxy S21 Ultra

77 out 100
Samsung Galaxy S24 (Exynos)
VS
67 out 100
Samsung Galaxy S21 Ultra
Samsung Galaxy S24 (Exynos)
Samsung Galaxy S21 Ultra

Compared 2 smartphones : Samsung Galaxy S24 (Exynos) Manufactured in January, 2024, with display 6.2 with chipsetSamsung Exynos 2400, vs Samsung Galaxy S21 Ultra, Manufactured in February, 2021 with chipsetSamsung Exynos 2100. Below are specs, tests, pros and cons for each device

  1. Differences
  2. Review
  3. Specs
  4. Benchmarks
  5. Battery Life
  6. Cameras
  7. Comments (0)

Key Differences

Device key advantages
Reasons to choose Samsung Galaxy S24 (Exynos)
  • Lighter design: 167g vs 227g
  • Newer Bluetooth version: 5.3 vs 5.2
  • Supports DisplayPort
Reasons to choose Samsung Galaxy S21 Ultra
  • Larger display: 6.8in
  • Higher pixel density: 515ppi
  • Higher battery capacity: 5000mAh vs 4000mAh

Versions

Available versions and configurations
Memory Options - 8/128 GB
- 8/256 GB
- 8/512 GB		 - 12/128 GB
- 12/256 GB
- 12/512 GB
- 16/256 GB
- 16/512 GB

Review

Key Specs Samsung Galaxy S24 (Exynos) and Samsung Galaxy S21 Ultra
Display
Color accuracy, sharpness & brightness
Camera
Main & front camera tests
Performance
App & system performance
Games
3D gaming performance
Battery
Battery life, charging speed & type
Connectivity
Connectivity features
NanoReview Score
Overall score by NanoReview
Adjust each parameter’s importance to find the best match for you.
Customize your score
Function
Importance (Weight)
Display:
Camera:
Performance:
Gaming:
Battery:
Connectivity:
Higher weight means greater impact on NanoReview score.

Tests & specs

Specs & test comparison
Smartphones:
Galaxy S24 (Exynos)
vs
Galaxy S21 Ultra

Display

Display quality comparison
Type Dynamic AMOLED Dynamic AMOLED
Size 6.2 in 6.8 in
Resolution 1080x2340 pixels 1440x3200 pixels
Aspect ratio 19.5:9 20:9
Pixel density 416 ppi 515 ppi
Refresh rate 120 Hz 120 Hz
Adaptive refresh rate Yes (24-120 Hz) Yes (10-120 Hz)
Max brightness 2600 nits 1500 nits
HDR support Yes HDR10+ Yes HDR10+
Touch Sampling Rate 240 Hz n/a
Screen-to-body ratio 90.9 % 89.5 %
Features - DCI-P3
- Always-On Display		 - DCI-P3
- Always-On Display
Display test
Peak brightness (auto)
Samsung Galaxy S24 (Exynos)
1356 nits
Samsung Galaxy S21 Ultra
1019 nits
sRGB gamut98.9 %n/a
PWM (Flicker)483 Hzn/a
Response time1 msn/a
Contrast∞ Infiniten/a
Sources: NotebookCheck [Samsung Galaxy S24 (Exynos)], [Samsung Galaxy S21 Ultra]

Design & Build

Design and ergonomics comparison
Height 147 mm (5.79 in) 165.1 mm (6.5 in)
Width 70.6 mm (2.78 in) 75.6 mm (2.98 in)
Thickness 7.6 mm (0.3 in) 8.9 mm (0.35 in)
Weight 167 g (5.89 oz) 227 g (8.01 oz)
Water resistance IP68 IP68
Cooling system Vapor chamber n/a
Back panel Glass Glass
Frame Metal Metal
Colors - Black
- Gray
- Blue
- Green
- Orange
- Purple
- Yellow		 - Black
- Silver
- Gray
- Blue
Fingerprint sensor Yes In-Display Yes In-Display
Screen-to-body ratio
Samsung Galaxy S24 (Exynos)
90.9 %
Samsung Galaxy S21 Ultra
89.5 %

Performance

Testing Samsung Galaxy S24 (Exynos) and Samsung Galaxy S21 Ultra In benchmarks
Processor
Chipset Samsung Exynos 2400 Samsung Exynos 2100
Max Frequency 3210 MHz 2900 MHz
CPU Cores 10 (1 + 2 + 3 + 4) 8 (1 + 3 + 4)
Architecture - 4/1.95 (Cortex-A520)
- 3/2.6 (Cortex-A720)
- 2/2.9 (Cortex-A720)
- 1/3.21 (Cortex-X4)		 - 4/2.2 (Cortex-A55)
- 3/2.81 (Cortex-A78)
- 1/2.91 (Cortex-X1)
Process Samsung Samsung
Transistor Size 4 nm 5 nm
Neural Processor Yes Yes
Graphics Samsung Xclipse 940 Mali-G78 MP14
GPU Cores 768 896
GPU Frequency 1095 MHz 854 MHz
FLOPS 3406.8 GFLOPS 1530.4 GFLOPS
GeekBench v6
Geekbench 6 (Single-Core)
Samsung Galaxy S24 (Exynos)
2181
Samsung Galaxy S21 Ultra
1449
Geekbench 6 (Multi-Core)
Samsung Galaxy S24 (Exynos)
6889
Samsung Galaxy S21 Ultra
3892
Geekbench 6 (Single-Core)21811449
Geekbench 6 (Multi-Core)68893892
Geekbench Compute (GPU)13839n/a
Sources: Geekbench v6 [Samsung Galaxy S24 (Exynos)]
AnTuTu 10
AnTuTu 10
Samsung Galaxy S24 (Exynos)
1725329
Samsung Galaxy S21 Ultra
843008
CPU421930232358
GPU672525256356
Memory340303163007
UX290571191217
NanoReview Score1725329843008
3DMark Wild Life
3DMark Wild Life
Samsung Galaxy S24 (Exynos)
12828
Samsung Galaxy S21 Ultra
5221
Max Surface Temp.46.6 °C40.8 °C
Stability55 %69 %
Graphics Test76 fps31 fps
Graphics Score128285221
Sources: 3DMark [Samsung Galaxy S24 (Exynos)], [Samsung Galaxy S21 Ultra]
PCMark 3.0
PCMark 3.0
Samsung Galaxy S24 (Exynos)
17199
Samsung Galaxy S21 Ultra
n/a
Writing score21676n/a
Web score16585n/a
Video editing8032n/a
Data manipulation15131n/a
NanoReview Score17199n/a

Memory

RAM
RAM Size 8 GB - 12 GB
- 16 GB
Memory Type LPDDR5X LPDDR5
Memory Frequency 4200 MHz 2750 MHz
Channels 4 2
Storage
Storage Capacity- 128 GB
- 256 GB
- 512 GB		- 128 GB
- 256 GB
- 512 GB
Storage TypeUFS 4.0UFS 3.1
Memory CardNoNo

Software

OS Android 14 Android 11 (Upgradeable to Android 14)
OS Size 24.1 GB 26.4 GB
UI Skin One UI 6.1 One UI 6

Battery

Volume 4000 mAh 5000 mAh
Max Charging Power 25 W 25 W
Battery Type Li-ion Li-ion
Removable No No
Wireless Charging Yes (15 W) Yes (15 W)
Reverse Charging Yes (Wireless) Yes (Wireless)
Fast Charging Yes (50% in 30 min) Yes (54% in 30 min)
Full Charge Time 1:15 h 1:11 h
Battery Life Test
Battery Life
Samsung Galaxy S24 (Exynos)
19:23
Samsung Galaxy S21 Ultra
22:05
Web Browsing07:20 h07:58 h
Video Playback11:58 h13:59 h
Games04:04 h05:14 h
Standby Mode97 h111 h

Main camera

Matrix 50 MP 108 MP
Photo resolution 8160x6120 pixels 12000x9000 pixels
Zoom Optical, 3x Optical, 10x
Flash LED Dual LED
Stabilization Optical Optical
8K Recording Yes (Up to 30 fps) Up to 24FPS
4K Recording Yes (Up to 60 fps) Yes (Up to 60 fps)
1080p Recording Yes (Up to 60 fps) Yes (Up to 60 fps)
Slow Motion 240 fps (1080p) 960 fps (720p)
Wide-angle lens 120 ° 120 °
Lenses count Standard: 50 MP
Telephoto: 10 MP
Ultra-wide: 12 MP		 Standard: 108 MP
Telephoto: 10 MP
Telephoto: 10 MP
Ultra-wide: 12 MP
Features - Bokeh effect
- Pro mode
- RAW support		 - Bokeh effect
- Pro mode
- RAW support
Main lens
Matrix50 MP108 MP
Aperturef/1.8f/1.8
Focal length24 mm26 mm
SensorSamsung GN3Samsung S5KHM3
Sensor size1/1.571/1.33
Pixel size1 μm0.8 μm
AutofocusPhase autofocus (Dual Pixel)Laser autofocus
StabilizationOpticalOptical
Telephoto
Matrix10 MP10 MP
Aperturef/2.4f/4.9
Focal lengthn/a240 mm
SensorSamsung S5K3K1Samsung S5K3J1
Sensor size1/3.91/2.65
Pixel size1 μm1.22 μm
StabilizationOpticalOptical
Ultra-wide lens
Matrix12 MP12 MP
Aperturef/2.2f/2.2
Focal length13 mm13 mm
SensorSony IMX564Sony IMX563
Sensor size1/2.551/2.55
Pixel size1.4 μm1.4 μm
StabilizationDigitalDigital
Main camera DxOMark results
Photo quality
Samsung Galaxy S24 (Exynos)
n/a
Samsung Galaxy S21 Ultra
121
Video quality
Samsung Galaxy S24 (Exynos)
n/a
Samsung Galaxy S21 Ultra
100
Overall camera score
Samsung Galaxy S24 (Exynos)
n/a
Samsung Galaxy S21 Ultra
115
Bokehn/a70
Previewn/a67
Zoomn/a106
Sources: DxOMark [Samsung Galaxy S21 Ultra]

Front camera

Matrix 12 MP 40 MP
Photo resolution 4000x3000 pixels 7864x5200 pixels
Aperture f/2.2 f/2.2
Focal length 26 mm 26 mm
Sensor Samsung S5K3LU Samsung S5KGH1
Sensor size 1/3.2 1/2.65
Pixel size 1.12 μm 0.7 μm
Autofocus Phase autofocus Phase autofocus
Stabilization Digital Digital
Video resolution 2160p (4K) at 60 fps 2160p (4K) at 60 fps
TOF 3D sensor No No
Selfie camera DxOMark results
Photo quality
Samsung Galaxy S24 (Exynos)
n/a
Samsung Galaxy S21 Ultra
133
Video quality
Samsung Galaxy S24 (Exynos)
n/a
Samsung Galaxy S21 Ultra
140

Connectivity

Wi-Fi version 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 5.3 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
DisplayPort Yes DP 1.2 n/a
GPS - GPS
- GLONASS
- Beidou
- Galileo
- QZSS		 - GPS
- GLONASS
- Beidou
- Galileo
NFC* Yes Yes
Infrared Port No No
Connectivity
SIM Count*12
SIM TypeNanoNano
SIM Moden/aDual SIM Standby
eSIM Support *YesYes
Hybrid SlotNoNo
2G BandsGSM850, GSM900, DCS1800, PCS1900GSM 850, 900, 1800, 1900 MHz
3G BandsUMTS B1(2100), B2(1900), B4(AWS), B5(850), B8(900)WCDMA Band 1, 2, 4, 5, 8
LTE category2024
5G SupportYesYes

Sound

Speakers Stereo Stereo
3.5 mm Jack No No
FM Radio No No
Dolby Atmos Yes Yes
Speaker Test
Max Volume
Samsung Galaxy S24 (Exynos)
91.4 dB
Samsung Galaxy S21 Ultra
88 dB

Other

Class Flagship Flagship
Announced January, 2024 yr January, 2021 yr
Release Date January, 2024 yr February, 2021 yr
Launch Price ($) 799 1200
Sensors - Hall Sensor
- Barometer
- Proximity Sensor
- Gyroscope
- Accelerometer
- Ambient Light Sensor
- Compass
- Fingerprint sensor		 - Hall Sensor
- Barometer
- Proximity Sensor
- Gyroscope
- Accelerometer
- Ambient Light Sensor
- Compass
- Fingerprint sensor
Charger Included No n/a

Note

Samsung Galaxy S24 (Exynos):

The 128 GB variant features UFS 3.1 memory, other models have UFS 4.0. There are two models: one with dual Nano SIM, and the other with 1 Nano SIM + eSIM.

* Attention! Config, frequencies, NFC, and other specs may vary by region.

Results

After analyzing the data, we consider Samsung Galaxy S24 (Exynos) the clear winner in this comparison.

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