The 75 D Compact PCR has the Aluminum frame, decocker, lanyard loop, chambered round indicator, rubber grips, and the slanted sights. By the way mine also has the black barrel. The ones that have the PCR on the slide were over runs for the foreign market. The US versions did not. They will have PCR on the box. However, some US PCR had night sights that were special orders. The PCR is the smaller version of the CZ 75 BD police. The steel frame PCR's were Israeli police turn-ins.
The P01 has the longer to the end of the barrel aluminum frame with the rail, the decocker, and rubber grips, w/o the lanyard loop, chambered round indicator and the slanted sights. They were also approved with a NATO number. Most will not have this number on the frame like the earlier ones. CZ also now has the P01 with the new Omega trigger and has the Omega on the frame.
The 75 compact has a steel frame, with the manual safety, and plastic grips, w/o the lanyard loop, chambered round indicator and the slanted sights. also weights about 6 ounces more than a PCR. A smaller version of the CZ 75 B.
These are basically the US versions of the 75 Compacts. The railed 75 compacts, like the others with different markings are either over runs for foreign orders new and old or just older version of the similar weapons.