

To be fair, I don’t know any benchmark for this comparison. But I just tried a relatively big file with both of them. Opening part is not really noticeable, but fast-forwarding is much better and slicker in mpv. In VLC it looks like it’s jumping between scenes, in mpv you actually see the motion of it’s getting fast-forward.
They do not. F-Droid also compiles from the source, they are the same apps.