One thing i learned in my tech/gadget life is that "You should always go for the Pro", you know why the pro version is an improvement of the former version. The Ps4 is good but the Ps4 pro is better in graphics and time play overheating, but like the poster above me said it depends on your setup.
I don't have a Ps4 but my two friends have but the pro and the former, and with a good setup on the former, you actually tell the difference between it and the Pro, but on a normal ground the Pro is better. so it's worth the bucks.
PS:But why not go for a good gaming Pc, it's actually better than both *winks*, my opinion tho.