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

Samsung Galaxy S24 (Exynos) vs Samsung Galaxy S21

77 out 100
Samsung Galaxy S24 (Exynos)
VS
65 out 100
Samsung Galaxy S21
Samsung Galaxy S24 (Exynos)
Samsung Galaxy S21

Compared 2 smartphones : Samsung Galaxy S24 (Exynos) Manufactured in January, 2024, with display 6.2 with chipsetSamsung Exynos 2400, vs Samsung Galaxy S21, 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 169g
  • Newer Bluetooth version: 5.3 vs 5
  • Supports DisplayPort
Reasons to choose Samsung Galaxy S21
  • Higher pixel density: 421ppi

Versions

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

Review

Key Specs Samsung Galaxy S24 (Exynos) and Samsung Galaxy S21
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
Samsung Galaxy S21

Display

Display quality comparison
Type Dynamic AMOLED Dynamic AMOLED
Size 6.2 in 6.2 in
Resolution 1080x2340 pixels 1080x2400 pixels
Aspect ratio 19.5:9 20:9
Pixel density 416 ppi 421 ppi
Refresh rate 120 Hz 120 Hz
Adaptive refresh rate Yes (24-120 Hz) Yes (48-120 Hz)
Max brightness 2600 nits 800 nits
HDR support Yes HDR10+ Yes HDR10+
Touch Sampling Rate 240 Hz n/a
Screen-to-body ratio 90.9 % 85.9 %
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
854 nits
sRGB gamut98.9 %99.5 %
PWM (Flicker)483 Hz240 Hz
Response time1 ms5 ms
Contrast∞ Infinite∞ Infinite
Sources: NotebookCheck [Samsung Galaxy S24 (Exynos)], [Samsung Galaxy S21]

Design & Build

Design and ergonomics comparison
Height 147 mm (5.79 in) 151.7 mm (5.97 in)
Width 70.6 mm (2.78 in) 71.2 mm (2.8 in)
Thickness 7.6 mm (0.3 in) 7.9 mm (0.31 in)
Weight 167 g (5.89 oz) 169 g (5.96 oz)
Water resistance IP68 IP68
Cooling system Vapor chamber n/a
Back panel Glass Plastic
Frame Metal Metal
Colors - Black
- Gray
- Blue
- Green
- Orange
- Purple
- Yellow		 - White
- Gray
- Pink
- Purple
Fingerprint sensor Yes In-Display Yes In-Display
Screen-to-body ratio
Samsung Galaxy S24 (Exynos)
90.9 %
Samsung Galaxy S21
85.9 %

Performance

Testing Samsung Galaxy S24 (Exynos) and Samsung Galaxy S21 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
1331
Geekbench 6 (Multi-Core)
Samsung Galaxy S24 (Exynos)
6889
Samsung Galaxy S21
3593
Geekbench 6 (Single-Core)21811331
Geekbench 6 (Multi-Core)68893593
Geekbench Compute (GPU)13839n/a
Sources: Geekbench v6 [Samsung Galaxy S24 (Exynos)]
AnTuTu 10
AnTuTu 10
Samsung Galaxy S24 (Exynos)
1725329
Samsung Galaxy S21
903780
CPU421930253391
GPU672525281676
Memory340303158352
UX290571210361
NanoReview Score1725329903780
3DMark Wild Life
3DMark Wild Life
Samsung Galaxy S24 (Exynos)
12828
Samsung Galaxy S21
5715
Max Surface Temp.46.6 °C38.9 °C
Stability55 %66 %
Graphics Test76 fps34 fps
Graphics Score128285715
Sources: 3DMark [Samsung Galaxy S24 (Exynos)], [Samsung Galaxy S21]
PCMark 3.0
PCMark 3.0
Samsung Galaxy S24 (Exynos)
17199
Samsung Galaxy S21
13123
Writing score2167616101
Web score1658511909
Video editing80327097
Data manipulation1513110153
NanoReview Score1719913123

Memory

RAM
RAM Size 8 GB 8 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
Storage TypeUFS 4.0UFS 3.1
Memory CardNoNo

Software

OS Android 14 Android 11 (Upgradeable to Android 14)
OS Size 24.1 GB 28.1 GB
UI Skin One UI 6.1 One UI 6.0

Battery

Volume 4000 mAh 4000 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 (55% in 50 min)
Full Charge Time 1:15 h 1:35 h
Battery Life Test
Battery Life
Samsung Galaxy S24 (Exynos)
19:23
Samsung Galaxy S21
17:54
Web Browsing07:20 h06:01 h
Video Playback11:58 h11:06 h
Games04:04 h04:21 h
Standby Mode97 h95 h

Main camera

Matrix 50 MP 12 MP
Photo resolution 8160x6120 pixels 4000x3000 pixels
Zoom Optical, 3x Optical, 1.1x
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: 12 MP
Telephoto: 64 MP
Ultra-wide: 12 MP
Features - Bokeh effect
- Pro mode
- RAW support		 - Bokeh effect
- Pro mode
- RAW support
Main lens
Matrix50 MP12 MP
Aperturef/1.8f/1.8
Focal length24 mm26 mm
SensorSamsung GN3Sony IMX555
Sensor size1/1.571/1.76
Pixel size1 μm1.8 μm
AutofocusPhase autofocus (Dual Pixel)Phase autofocus (Dual Pixel)
StabilizationOpticalOptical
Telephoto
Matrix10 MP64 MP
Aperturef/2.4f/2.0
Focal lengthn/a28 mm
SensorSamsung S5K3K1Samsung Bright S5KGW2
Sensor size1/3.91/1.72
Pixel size1 μm0.8 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
129
Video quality
Samsung Galaxy S24 (Exynos)
n/a
Samsung Galaxy S21
137
Overall camera score
Samsung Galaxy S24 (Exynos)
n/a
Samsung Galaxy S21
133
Bokehn/a70
Previewn/a72
Zoomn/a126
Sources: DxOMark [Samsung Galaxy S21]

Front camera

Matrix 12 MP 10 MP
Photo resolution 4000x3000 pixels 3872x2592 pixels
Aperture f/2.2 f/2.2
Focal length 26 mm 26 mm
Sensor Samsung S5K3LU Sony IMX374
Sensor size 1/3.2 1/3.24
Pixel size 1.12 μm 1.22 μm
Autofocus Phase autofocus Phase autofocus (Dual Pixel)
Stabilization Digital Digital
Video resolution 2160p (4K) at 60 fps 2160p (4K) at 60 fps
TOF 3D sensor No No

Connectivity

Wi-Fi version Wi-Fi 6E (802.11 a/b/g/n/ac/ax) Wi-Fi 6 (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
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
87 dB

Other

Class Flagship Flagship
Announced January, 2024 yr January, 2021 yr
Release Date January, 2024 yr February, 2021 yr
Launch Price ($) 799 800
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.

Survey

Which smartphone would you pick?
2 (100%)
0 (0%)
Total Votes: 2

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