I responded to this elsewhere.
The SP-01 is NOT an enlarged version of the P-01. Its just a 75B with some of the features of the P-01 (i.e., the longer dustcover and accessory rail.) It's also STEEL rather than alloy which makes it noticeably heavier. The SP-01 was intended for USPSA and IDPA competition, and other versions (called the Shadow or Shadlow 2) also exist. There was (and apparently still is) a polymer-framed version of the SP-01, called the Phantom; I thought it had been discontinued, but it's on the CZ-USA website for 2017. (That site seems to be in the process of being updated, as many models are missing.)
I think the P-01 and PCR (both alloy-framed compact versions of the 75B) have a slightly different trigger than the other metal-framed CZ, with more curve, and that makes trigger reach different on those two guns; but the grips themselves (except for grip length) are basically the same. The trigger can be changed if you want better trigger reach by installed the P-01 trigger.
All of the metal-framed guns can be started safely from the "half-cock" notch, but IDPA and USPSA won't allow that in matches unless they're decocker-equipped. All decocker models start from the half-cocked notch if the gun has been decocked.