There is a big difference between the PFS and the Evocomp grips.
Aside from the price aspect.
For the PFS is only one choice of grip for each model of gun, the Evocomp can be custom made to your grip to ensure better gun fit.
While you can add plastic wood to the PFS grip it still will require a lot of time to finish it off and repaint it.
I had a PFS grip but it shoot loose too many times (final solution was to use loctite), I now have gone to a Evo grip and it over 2 years it has not moved from the original settings.
The biggest advantage the PFS had was it could be set to reduce recoil, but now the Evo can do this as well.