My daughter has a PX4 Compact, which has the rotating barrel, and while it is impossible to isolate the cause to the rotating barrel, it is an extremely soft shooting pistol. My impression is that the rotating barrel works well in softening recoil.
But you don't seem to have that choice anyway. I don't consider the PX4 line to be unproven, just under-appreciated. I have a Glock 26 and like it, but I personally wouldn't pay $600 or so more for it than a PX4 subcompact, unless I was fiercely opposed to having a thumb safety. For me, that would be a non-issue, because with the Beretta I have the option of carrying it safety off, which given the long relatively heavy first DA trigger pull, is an option that a lot of people prefer and consider as safe as the Glock system.