Samsung Galaxy S21 vs Galaxy A51, are they as different as you think?


There are 600 euros of difference between these mobiles. But are they really that different? We compare the Galaxy S21 and the Galaxy A51.

Between these two mobiles there are 600 euros difference in their prices. And yet share more traits than we might expect.

The Samsung Galaxy S21 and Samsung Galaxy A51 are two of the most popular phones that we can find in the Samsung catalog. One, for being the last installment of the Galaxy S series, and the other, for having become the best-selling Android mobile on the planet.

Just take a look at their prices to realize that we are facing two very different terminals. But where are the differences really? Today we wanted to compare both terminals and highlight their most important similarities and inequalities.

Samsung Galaxy S21 vs Samsung Galaxy A51

The Samsung Galaxy S21 and the Galaxy A51.

Design and screen: perforated screen and a very different aesthetic

In aesthetic terms, the Galaxy A51 and S21 bear certain similarities. It is the case of the leaky screen, in both cases with a hole located in the upper central part of the panel.

We also speak of two displays with Full HD + resolution and based on AMOLED technology. The main difference lies in the fact that the Galaxy S21 equips a panel with variable refresh rate up to 120 hertz, while the A51 stays with 60 Hz.

To that we must add that both devices have a plastic body. In the S21, we have a back with a matte polycarbonate finish, the same material that we find in the A51, although in this case we are talking about a shiny back.

One of the main differences in this sense is found in terms of size and weight. The Galaxy A51 is a significantly larger device, standing at about 16 centimeters tall. The S21, on the other hand, narrowly exceeds 15 centimeters since its screen occupies a diagonal of 6.2 inches, compared to the 6.5 of the A51.

Cameras: three, better than four

The comparison of cameras between these two models makes it very clear that Numbers are not everything when talking about photography.

And it is that although the S21 has three sensors on the back, they are far superior to the Galaxy A51 in every way.

We are talking about a configuration led by a 12 megapixel sensor main, to which must be added a 12 megapixel ultra wide angle camera, and a sensor that acts as a telephoto, 64 megapixels.

In the Galaxy A51, however, we have a 48 megapixel main camera, a sensor with a 12 megapixel ultra wide angle lens, a 5 megapixel macro camera, and a depth sensor with the same resolution as the previous one.

When comparing the captures taken with each model, it is not difficult to deduce that the largest sensor size of the S21 helps the captures are of a much higher quality to those of the Galaxy A51. The technologies built into the processor also help, and the greater versatility provided by the two additional cameras that cover a greater focal range.

If we talk about the front camera, the S21 has a 10 megapixel sensor, and the A51 with one of 32 megapixels. Still, the S21 wins the game again by being able to capture selfies brighter and with more detail.

Samsung Galaxy S21 pink, rear

The Galaxy S21 in pink.

Battery and performance: the S series pushes your chest

The price difference is also manifested in the aspects related to the autonomy and performance. After all, the S21 is powered by the Exynos 2100 processor, the most powerful ever to come out of Exynos factories.

In A51, on the other hand, it integrates a much more chip humble, the Exynos 9611. While both feature an eight-core architecture, the latest model offers a higher power and efficiency.

About the battery, although in both cases we talk about devices with 4,000 mAh capacity, the S21 wins the game by using a more efficient and modern processor. In addition to having 25W fast charging, and support for fast wireless charging and reverse wireless charging.

Processor and memory: Exynos brain and different configurations

We have already talked about processors that give life to these two terminals. In both cases we are talking about chips signed by Exynos, with a extra power, efficiency and innovation in the case of the Exynos 2100 of the Galaxy S21.

In terms of memory, the S21 arrives with 8 GB of RAM by default, and in versions with 128 or 256 GB of storage. The A51, for its part, maintains 128 GB of storage in its base version, but its RAM memory drops to 4 GB, half that of the Galaxy S21.

Connectivity: only one model with 5G

If you plan to enter the era of 5G and you are thinking of buying one of these two phones, you have two options: o you discard the Galaxy A51 and opt for the S21, or you bet on the 5G version of the Samsung Galaxy A51, a little more expensive than the original.

And is that the S21 is the only model with a 5G modem integrated into its SoC. In addition, it has other advances in terms of connectivity that we do not find in the A51, such as support for Wi-Fi 6.

In both cases, yes, we have NFC for mobile payments, Bluetooth 5, GPS and other typical functions of the brand's devices. In favor of the Galaxy A51 it must be said that it is the only one of the two that has FM Radio.

Galaxy A51 display

The Galaxy A51, one of the best-selling mobiles of 2020 and 2021.

Other features

There are other differences that we can find when comparing the Galaxy S21 with the Galaxy A51.

For example, although both models have a fingerprint reader integrated into the screen, only the S21 uses the second generation of Qualcomm ultrasonic technology, which offers greater sensor reliability and accuracy. The A51, instead, opts for a optical sensor, which needs to illuminate a portion of the screen in order to scan the user's fingerprint.

Also, only the A51 has a 3.5 mm headphone port, which the more expensive model lacks.

Samsung Galaxy S21 vs Galaxy A51, which one should you buy?

Taking into account the price difference, the truth is that it is difficult for someone to find themselves in the position of having to choose between one and the other. Logically, the S21 is a model better and more complete in every way.

However, this comparison helps us to realize that, although the differences are there, Samsung's mid-range has raised the bar in recent years, and today it is possible to find phones as good as the A51 at prices that do not even exceed 300 euros.