There is NO DIFFERENCE between the triggers on the decocker models and the non-decocker models. The key parts are exactly the same. The only difference is that the decocker model has a bit more of the sear removed to make room for the decocker mechanism, but that's not something you feel or which can affect the trigger pull.
If you've noticed a difference -- which is certainly possible -- when starting from the same starting positions (i.e., hammer fully down on both, or hammer on the half-cock notch on both) it has to do with the differences between particular guns, and not between the model lines.
Either gun can be started from the half-cocked position, and that shortens the trigger pull slightly and lightens the trigger weight by about a pound. Its safe to carry this way, because both guns have firing pin blocks. (And the Decocker models automatically decock to that position; that's the normal carry mode for the decocker models.)
Which to get? The PCR and Compact have the same measurements, but the PCR has an alloy frame, which is lighter. The Compact, while heavier, has the ability to do "cocked and locked." I prefer the Compact, but would love an alloy-framed version that allows C&L. Unhappily, the parts can't be swapped, as the internals of the frame (to accomodate the decocker and safety) are slightly different.
Note: Forgive me if I come across as a curmudgeon on this point, but...
I know people think its unsafe to decock to half-cock or full hammer down, but gun owners have been doing it for generations with revolvers, and the world hasn't come to an end.
Further, I would argue that if you can't decock your own pistol manually you ought not be shooting a gun -- that's a very simple technique that should be mastered as a basic handgun handling skill.