I think the problem for me is that the DS3 has been ruined by the feel of the DS4 now, physically.
Most importantly the DS4 is completely hassle-free compared to the DS3 on PC, I found both Better DS3 and DS3Tool extremely finnicky to use. I could observe the same conditions (re: plugging in cables, starting the program, using the same settings) with the DS3 worked one day then just refused to function the next.
Whereas with the DS4 you can literally just plug it in and it works with most games and programs (on Win10 it's recognised as an XInput controller without 3rd party drivers). If it doesn't all you do is start up DS4 Windows and that always solves the problem by emulating the X360 controller. It even lets you use the trackpad on the controller as a mouse.