The Compact is better off sharing a holster designed for the PCR as to the other way around. The PCR has an extended mag release that can be abrasive to the shooter in certain carry positions, the holster should cover the mag release while being carried. They should both have a high back design. The PCR's decocker can be abrasive and the Compact's should cover the safety for proper Cond. 1 carry.
The mag release on the Compact isnt an issue when carrying IWB/SOB. I can design a holster for you if you'd like. I actually have a couple of SOB's on the dwg board. One has a single, very strong clip for retention and has a vertical grip position. The other is a double belt loop design. Both are single ply leather without a top strap. I feel this design warrants the thinnest holster possible for more comfortable carry. Tell you what, email me......Ive a plan youll like.
Shoot well...Eric