The author of the YouTube channel Technotin demonstrated how the new Galaxy S25 actually shoots photos and videos on the background of S21.
The front camera as a whole in both smartphones shoots the video equally well. At the same time, the picture of the S25 is more saturated, and the S21 has more gray and pale. In 4K 60 f/s mode, you can switch to S25 between all lenses, and S21 does not have such a function at all.
You can record a video on a TV of S21 only in 4K 30 f/s. And in terms of image quality, he loses against the background of S25 due to less resolution.





You can familiarize yourself with the examples of photos above. On the left – S25, on the right – S21. Here the differences between the devices are so small that we can say that they are not.
Conclusion
The largest update in the Galaxy S25 compared to S21 is the possibility of switching between lenses in 4K 60 FPS. Otherwise, the difference between smartphones is “none”.