The Keyboard/mouse vs controller debate is largely subjective. You can use either input method on both the PS4 and PC, which is what SE does during Fanfest events. (THere are PCs with keyboards and controllers and other areas usually used PS4s with dual shock controllers and mouse/keyboard plugged in too).

A mouse does make some things easier (UI elements), but I wouldn't consider a keyboard to be any more efficient than a controller in this game. Especially if you have to weffectively relearn how to interact with the interface and hotkeys all over. Mix and match for your own comfort/efficiency.

If you are interested in making that switch over, you can upload your settings to thel obby server and download them on the other device as well. So I'd recommend setting things up the way you like it on PS4 or PC, and then sync them to the other for consistency.