Samsung a51 vs s20 Review [Must-Read Comparison]

The Samsung a51 and s20 are both excellent phones with the same operating system.

They each have their own pros and cons, but they are very similar in all other aspects.

The best way to decide which phone will be best for you is by comparing your needs to see which phone better meets those needs.

Let the Samsung a51 vs s20 comparison begin of the galaxy s series begin!

Samsung Galaxy S20 vs Galaxy A51 | Comparison! - YouTube
Samsung a51 vs s20

See Also:

How to Screenshot on a51

How To Turn Off a51

Galaxy a20 Review

Why is the Samsung Galaxy A51 superior to the Samsung Galaxy S20?

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✅ How about a 4.84 percent larger screen size?

✅ 6.5″vs6.2″

✅ 3.2x the number of megapixels (front camera)?

✅ 32MPvs10MP

✅ 128GB of additional internal storage?

✅ 256GBvs128GB

✅ Is there a 3.5 mm audio jack socket?

✅ Is there a radio?

✅ Is there a manual shutter speed?

✅ 75.99 percent less expensive?

✅ 233.22 EUR vs. 971.1943024925222 EUR

Why is the Samsung Galaxy S20 superior to the Samsung Galaxy a51?

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✅ 39.75% more pixel density?

✅ 566ppivs405ppi

✅ Is it possible to have a CPU that is 18.12 percent faster?

✅ 2 x 2.7GHz, 4 x 2.4GHz, and 2 x 1.95GHz over 4 x 2.3 and 4 x 1.7GHz

✅ 1.78x more resolution?

✅ 1440 x 3200 vs. 1080 x 2400

✅ More than 25.71 percent more megapixels (main camera)?

✅ 64MP and 12MP and 12MP vs 48MP and 12MP and 5MP and 5MP camera mode

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✅ Is it dust and water-resistant?

✅ Is it weatherproof (splashproof)?

✅ Is there optical picture stabilization built-in?

✅ Do you have stereo speakers?

In-Depth Specs Review

Samsung Galaxy s20= First

Samsung Galaxy s51= Second



  • 6.2 inches
  • 6.5 inches


  • 3200 x 1440 pixels, 20:9 aspect ratio, 566 PPI
  • 2400 x 1080 google pixel, 20:9 aspect ratio, 405 PPI


  • AMOLED (Dynamic AMOLED) technology app

Refresh rate

  • 120Hz (@1080p)
  • 60Hz


  • 88.59 percent
  • 87.37 percent


  • Scratch-resistant glass (Corning Gorilla Glass 6), Ambient light sensor, Proximity sensor Features: HDR support, live focus
  • Scratch-resistant glass (Corning Gorilla Glass 3), Ambient light sensor, Proximity sensor


System chip ( Qualcomm Snapdragon)

  • Qualcomm Snapdragon 865 SM8250
  • Samsung Exynos 9611

Processor (Samsung One UI)

  • Octa-core processor, 2840 MHz, Kryo 585, 64-bit, 7 nm
  • Octa-core processor, 2300 MHz, ARM Cortex-A73 and ARM Cortex-A53, 64-bit, 10 nm


  • Adreno 650
  • Mali-G72 MP3 GPU


  • 12GB LPDDR5 and
  • 4GB LPDDR4.

Internal Storage

  • 128GB of internal storage (UFS 3.0)
  • 128GB, usable space: 105.9 GB

Expansion storage

  • microSDXC up to 1000 GB
  • microSDXC up to 512 GB

Device Kind

  • Smartphone
  • Smartphone


  • Android (11, 10), Samsung One UI
  • Smartphone OS: Android (11, 10), Samsung One UI


  • 4000 mAh capacity
  • 4000 mAh battery


  • Li-Polymer, non-replaceable by the user
  • Li-Polymer, non-replaceable by the user


  • Qualcomm Quick Charge 2.0, Samsung Adaptive Fast Charging, Qi and Powermat wireless charging app, and reverse wireless charging are all available.
  • Rapid charging

Maximum charging speed:

Samsung Galaxy S20: 25.0W (wired); 15.0W (wireless).



  • Triple Camera
  • Quad Camera

Main Camera

  • 12 megapixels (OIS, PDAF)
  • 48 megapixels (PDAF)


  • F1.8 aperture; 26 mm focal length; 1/1.7 sensor size “; Pixel Dimensions light: 1.8 manual focus
  • F2.0 aperture; 26 mm focal length light; 1/2 sensor size “; Pixel Dimensions: 0.8 m

The second camera

  • 64 megapixels (Telephoto, OIS, PDAF)
  • 12 megapixels (Ultra-wide)


  • F2.0 aperture; 1/1.7 sensor size “; Pixel Dimensions: 0.8 m
  • F2.2 aperture; 13 mm focal length; 1.12 m pixel size
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The third camera

  • 12 megapixels (Ultra-wide, Autofocus)
  • 5 Megapixels (Macro)


  • F2.2 aperture; 13 mm focal length; 1.4 m pixel size
  • F2.4 aperture; 40 mm focal length

The fourth camera

Samsung Galaxy a51

5 Megapixels (Depth information)


F2.2 aperture; 1/5 sensor size “; Pixel Dimensions: 1.12 m

Video Recording

  • 3840×2160 (4K UHD) (60 fps), 1920×1080 (Full HD) (240 fps), 1280×720 (HD) 7680×4320 (8K UHD) (24 fps), 1280×720 (HD) (960 fps)
  • 3840×2160 (4K UHD) (30 frames per second), 1920×1080 (Full HD) (120 frames per second), 1280×720 (HD) (240 fps)



EIS, Hyperlapse


  • 10 Megapixels (PDAF, HDR)
  • 32 megapixels (HDR)

Video recording:

  • 4K UHD (3840×2160) (60 fps)
  • 1920×1080 pixels (Full HD)

Dimensions of DESIGN:

  • 5.97 x 2.72 x 0.31 inches (151.7 x 69.1 x 7.9 mm)
  • 6.24″ x 2.90″ x 0.31″ (158.5 x 73.6 x 7.9 mm)


  • 5.78 ounces (163.0 g)
  • 6.00 oz (172.0 g)


  • Glass (Corning Gorilla Glass 6); Aluminum frame
  • Back: plastic; frame: plastic


Samsung Galaxy s20: Water and dust resistance; IP68


  • 2D Face Unlock with Ultrasonic In-Screen Fingerprint
  • 2D Face Unlock and In-Screen Fingerprinting


  • Volume control on the right, as well as a lock/, unlock key
  • Volume control on the right, as well as a lock/, unlock key


Cosmic Blue, Cosmic Grey, Cosmic pink, and Cosmic white

Prism Crush black, Prism Crush white, Prism Crush pink, and Prism Crush blue are all available.

Our Final Verdict

Our Final Thoughts

After reading this comparison of the Samsung Galaxy A51 vs. S20, it’s your decision to decide which smartphone you want to purchase for yourself or a loved one.

I think that the Galaxy A50 is better because it has more RAM and storage space than the S20.

However, if you are looking for something cheaper then go with the S20 instead!

Do not forget about our promo code “SAMSUNGAFF” when purchasing either phone so we can help support us through affiliate links on Amazon!

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I’ve chosen the Samsung Galaxy A51 because it has a camera that is more advanced.

The features are also better, and they can be used on all networks.

What about you?

Do you have any thoughts after reading this blog post? Let me know in the comments below!

Frequently Ask Questions

Is the Samsung A51 a good buy?

The Galaxy A51 still has decent hardware, and if you don’t mind scraping your fingerprints against a slab of glass all day, the Exynos 9611 processor and 4GB of RAM should suffice.

Sure, it’s a bit pricey if you intend to use the phone for many years, but you get what you pay for.

What's the problem with the Samsung A51?

The Samsung Galaxy A51, like many of its fully-baked smartphones, is an amazing device with great capabilities, however, some users have reported a couple of Samsung Galaxy A51 Issues on the internet.

Among the reported faults are keyboard troubles, display difficulty, and a slew of others.

Is the Samsung A51 still a good buy in 2021?

However, putting money down for the Galaxy A51 in mid-2021 isn’t a good idea unless — once again — you can locate it for less than half the initial price.

It’s simply no longer worth paying full price for it in the wake of so many 2021 Galaxy A phones boasting 5G and high refresh rate displays.

Samsungtechwin | + posts

Hi, I'm Khelly! I am your tech expert for all your Samsung Products and Information needs. Let me help you find solutions to your tech problems. Follow me.

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