C VS CS

So I have a P for work and looking to add a CS Compact Grip or C Compact grip to my collection? Which one would be best to go with? Does it make sense to go from P to a C from 4.4 to 4 or would it be a better idea to do 4.4 to 3.5? I don’t EDC the P at all, too big to EDC in my opinion.. so I’m wanting to carry something that is easy to conceal and a general purpose gun I guess… just want sound advice and don’t want to regret it haha.. ideal world would be to get both but can’t do that right now.