Actually they are already in the PCR....
The marketed metal improvements...were kinda...er...well...."marketing"

The frames/slides are the same as the PCR for the composition/process as the PO1..
According to CZUSA......
I will say the newer PCRs are a tighter fit than the older model. I believe they benefitted from the PO1's man. process.
They got the trigger and barrel from the PO1...barrel seems very accurate and the trigger in nicer to pull. The frame/barrel fit on my newest child is just tight! Its tighter than any gun Ive owned...but hasnt missed a beat so far..function isnt compromised.
IMO...they are very much the same gun...
The PO1 is a better duty/home defense weapon...light rail and all.
The PCR is a bettet carry weapon..thinner and easier to conceal. I cant see the benefit to carrying with a light...
IMO..it gives the BG a really good target to shoot at...you know?
Shoot well, The PCR Junkie