Do I need the pro bridge to tie into C4? if not aside from the 50 device limitation (that wont ever get hit) and the shading option is there any difference between caseta base and pro?

Ive worked with caseta before, and im almost certain the client didnt have the pro kit as it was installed by his electrician before i was ever brought into the mix.

I lost my C4 lighting to caseta. Im providing it since i can make a few bucks but this sucks. Hard to argue with the price and capability of Caseta especially when tied to a control system :( Too bad the switches are Fugly