Samsung Galaxy S21 FE 5G vs Galaxy A51

Here we compared two smartphones: the 6.4-inch Samsung Galaxy S21 FE 5G (with Qualcomm Snapdragon 888 ) that was released on January 4, 2022, against the Samsung Galaxy A51, which is powered by Exynos 9 Octa 9611 and came out 25 months before. On this page, you will find tests, full specs, strengths, and weaknesses of each of the gadgets.

Key differences

An overview of the main advantages of each smartphone
Reasons to consider the Samsung Galaxy S21 FE 5G
  • Waterproof body (IP68 classification)
  • 3.5x better performance in AnTuTu Benchmark (765K versus 217K)
  • The rear camera has a 3x optical zoom
  • Higher display refresh rate – 120 Hz
  • Compatible with the latest Wi-Fi 6 wireless networks
  • Supports wireless charging up to 15W
  • Delivers 25% higher peak brightness (799 against 637 nits)
  • Optical image stabilization
  • Comes with 500 mAh larger battery capacity: 4500 vs 4000 mAh
  • More energy-efficient CPU – Snapdragon 888
  • Uses a faster type of memory: LPDDR5 2750 MHz
  • Stereo speakers
Reasons to consider the Samsung Galaxy A51
  • Expandable storage via MicroSD card up to 512GB
  • Includes a 3.5 mm headphone audio jack port
We may receive a commission from Amazon for purchases made using the links below, but this has no bearing on our assessment methodology.

Review

Display
Screen quality, color accuracy, brightness
Performance
CPU/GPU performance in apps and games
Battery
Battery life, charging type and speed
Camera
Photo and video recording quality
Connectivity
Networks, ports, data transmission
NanoReview score
Final comparison evaluation

Value for money

You can enter your local price of these phones (in USD or any other currency) and click on the "Calculate" button to see which one has a better value for money.
Price

Tests and specifications

Comparison table of technical specifications and tests

Display

Type Dynamic AMOLED Super AMOLED
Size 6.4 inches 6.5 inches
Resolution 1080 x 2340 pixels 1080 x 2400 pixels
Aspect ratio 20:9 20:9
PPI 401 ppi 405 ppi
Refresh rate 120 Hz 60 Hz
Max rated brightness 420 nits 400 nits
Max rated brightness in HDR 1200 nits -
HDR support Yes, HDR10+ No
Screen protection Gorilla Glass Victus Corning Gorilla Glass 3
Screen-to-body ratio 89.6% 87.4%
Display features - DCI-P3
- Always-On Display
- Always-On Display
Display tests
RGB color space 97% 98.8%
PWM 247 Hz 242 Hz
Response time 6 ms 25 ms
Contrast ∞ Infinity ∞ Infinity
Peak brightness test (auto)
799 nits
637 nits
Sources: NotebookCheck [3], [4]

Design and build

Height 155.7 mm (6.13 inches) 158.5 mm (6.24 inches)
Width 74.5 mm (2.93 inches) 73.6 mm (2.9 inches)
Thickness 7.9 mm (0.31 inches) 7.9 mm (0.31 inches)
Weight 177 g (6.24 oz) 172 g (6.07 oz)
Waterproof IP68 No
Rear material Plastic Plastic
Frame material Metal Plastic
Colors White, Gray, Green, Purple White, Black
Fingerprint scanner Yes, in-display Yes, in-display
Screen-to-body ratio
89.6%
87.4%

Performance

Tests of Samsung Galaxy S21 FE 5G and Samsung Galaxy A51 in the benchmarks
SoC
Chipset Qualcomm Snapdragon 888 Samsung Exynos 9 Octa 9611
Max. clock 2840 MHz 2300 MHz
CPU cores 8 (1 + 3 + 4) 8 (4 + 4)
Architecture - 4 cores at 1.8 GHz: Kryo 680 Silver (Cortex-A55)
- 3 cores at 2.42 GHz: Kryo 680 Gold (Cortex-A78)
- 1 core at 2.84 GHz: Kryo 680 Prime (Cortex-X1)
- 4 cores at 1.7 GHz: Cortex-A53
- 4 cores at 2.3 GHz: Cortex-A73
L3 cache 4 MB -
Lithography process 5 nanometers 10 nanometers
Graphics Adreno 660 Mali-G72 MP3
GPU clock 840 MHz 850 MHz
FLOPS ~1720 GFLOPS ~259 GFLOPS

Benchmarks

Geekbench 5 (Single-Core)
1107
Geekbench 5 (Multi-Core)
3064
1298
AnTuTu Benchmark 9
765308
217818
CPU 194989 49711
GPU 281856 53719
Memory 133252 43824
UX 147872 70475
Total score 765308 217818
3DMark Wild Life Performance
5787
Stability 69% 95%
Graphics test 34 FPS 4 FPS
Graphics score 5787 812
PCMark 3.0 score 12363 -
Sources: 3DMark [3], [4]

Memory

RAM
RAM size 6, 8 GB 4, 6 GB
Memory type LPDDR5 LPDDR4X
Memory clock 2750 MHz 1866 MHz
Channels 2 2
Storage
Storage size 128, 256 GB 64, 128 GB
Storage type UFS 3.1 UFS 2.0
Memory card No MicroSD
Memory card max. size - Up to 512 GB

Software

Operating system Android 12 (Can be upgraded to Android 13) Android 10 (Can be upgraded to Android 13)
ROM One UI 5.0 One UI 5.0
OS size 17.5 GB 23 GB

Battery

Specifications
Capacity 4500 mAh 4000 mAh
Charge power 25 W 15 W
Battery type Li-Ion Li-Po
Replaceable No No
Wireless charging Yes (15 W) No
Reverse charging Yes, (wireless) No
Fast charging Yes (51% in 30 min) Yes (40% in 35 min)
Full charging time 1:15 hr 1:50 hr
Battery life tests
Web browsing 07:42 hr 09:34 hr
Watching video 13:05 hr 11:29 hr
Gaming 05:29 hr 05:12 hr
Standby 91 hr 83 hr
General battery life
26:34 hr
26:33 hr

Camera

Specs and camera test of smartphones
Main camera
Matrix 12 megapixels 48 megapixels
Image resolution 4032 x 3024 8000 x 6000
Zoom Optical, 3x Digital
Flash LED LED
Stabilization Optical Digital
8K video recording No No
4K video recording Up to 60FPS Up to 30FPS
1080p video recording Up to 60FPS Up to 30FPS
Slow motion 960 FPS (720p) 960 FPS (720p)
Angle of widest lens 123° 120°
Lenses 3 (12 MP + 8 MP + 12 MP) 4 (48 MP + 12 MP + 5 MP + 5 MP)
Wide (main) lens - 12 MP
- Aperture: f/1.8
- Focal length: 26 mm
- Pixel size: 1.8 micron
- Sensor: 1/1.76", Sony IMX555 (Exmor-RS CMOS)
- Phase autofocus (Dual Pixel)
- Optical stabilization
- 48 MP
- Aperture: f/2.0
- Focal length: 26 mm
- Pixel size: 0.8 micron
- Sensor: 1/2", Sony IMX582 (Exmor-RS CMOS)
- Phase autofocus
Telephoto lens - 8 MP
- Aperture: f/2.4
- Focal length: 76 mm
- Pixel size: 1 micron
- Sensor: 1/4.5", Hynix Hi847 (CMOS)
- Phase autofocus
- Optical stabilization
-
Ultra-wide lens - 12 MP
- Aperture: f/2.2
- Focal length: 13 mm
- Pixel size: 1.12 micron
- Sensor: 1/3.0", Sony IMX258 (Exmor-RS CMOS)
- 12 MP
- Aperture: f/2.2
- Focal length: 13 mm
- Pixel size: 1.12 micron
Macro lens - - 5 MP
- Aperture: f/2.4
- Focal length: 40 mm
- Pixel size: 1.12 micron
Depth lens - - 5 MP
- Aperture: f/2.2
- Pixel size: 1.12 micron
- Sensor: 1/5.0" (CMOS)
Camera features - Bokeh mode
- Pro mode
- RAW support
- Bokeh mode
- Pro mode
Samples Photo samples of Samsung Galaxy S21 FE 5G from DxOMark -
Selfie camera
Megapixels 32 megapixels 32 megapixels
Image resolution 6464 x 4864 6560 x 4928
Aperture f/2.2 f/2.2
Focal length 26 mm 26 mm
Pixel size 0.8 microns 0.8 microns
Sensor type Exmor-RS CMOS ISOCELL CMOS
Sensor size 1/2.74" 1/2.8"
Video resolution 2160p (4K) at 60 FPS 2160p (4K) at 30 FPS

DxOMark camera tests

Photo quality
Video quality
Generic camera score

Connectivity

Wi-Fi standard Wi-Fi 6 (802.11 a/b/g/n/ac/ax) Wi-Fi 5 (802.11 b/g/n/ac)
Wi-Fi features - Dual Band
- Wi-Fi MiMO
- Wi-Fi Direct
- Wi-Fi Hotspot
- Wi-Fi Display
- Dual Band
- Wi-Fi Direct
- Wi-Fi Hotspot
- Wi-Fi Display
Bluetooth version 5 5
Bluetooth features LE PBAP/PAB, PAN, OPP, MAP, HSP, HID, HFP, DIP, AVRCP, A2DP
USB type USB Type-C USB Type-C
USB version 3.2 2
USB features - Charging
- USB-Storage mode
- OTG
- Charging
- USB-Storage mode
- OTG
GPS GPS, GLONASS, Beidou, Galileo GPS, GLONASS, Beidou, Galileo
NFC* Yes Yes
Infrared port No No
Network
Number of SIM* 2 2
Type of SIM card Nano Nano
Multi SIM mode Standby Standby
eSIM support* No No
Hybrid slot No No
LTE Cat* 19 12
5G support Yes No

Sound

Speakers Stereo Mono
Headphone audio jack No Yes
FM radio No Yes
Dolby Atmos Yes Yes
Speakers test
Max. loudness
88.9 dB
81.7 dB

Other

Category Flagship Mid-range
Announced January 2022 December 2019
Release date January 2022 December 2019
SAR (head) 0.95 W/kg 0.596 W/kg
SAR (body) 1.48 W/kg 1.45 W/kg
Sensors - Hall-effect sensor
- Barometer
- Proximity sensor
- Gyroscope
- Accelerometer
- Ambient light sensor
- Compass
- Fingerprint
- Proximity sensor
- Gyroscope
- Accelerometer
- Ambient light sensor
- Compass
- Fingerprint
*Disclaimer! NFC, GSM network support, and some other specs can be different depending on the country.

Conclusion

After analyzing all the data, we think that the Samsung Galaxy S21 FE 5G is definitely a better buy.

Cast your vote

So, which phone would you choose?
50 (78.1%)
14 (21.9%)
Total votes: 64

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