The Oranges are hand fit and have different barrel bushings. Blues are base models.
The Shadow 2 is the latest internet fad running what 4-5 years now because it's a purpose built gun and dominates said class.
Tune it with a 60 dollar hammer and maybe even a 45 dollar disco and you'll have a SA trigger that smokes the vast majority of 1911s.
The slide markings can be funny, CZ marks the slides differently for the U.S. and Euro markets, then sometimes those Euro guns get imported, and sometimes CZ just throws whatever slide it has to complete an order.
I have no issues racking the slide and neither does anyone that has ever shot them.
Every single CZ I own out classes other pistols. My 97 is smoother and more accurate than both my Dan Wesson 1911s and others I've shoot. 75s, shadow 2, pcrs, p09 etc, once again more accurate than SW MPs, glocks, hi power, P320, X5 legion, P226, caniks.
The PCR, a compact with an alloy frame and decocker are wonderful ccw guns, I own 3, 2 really 1 is a rare steel frame dococker.
My carry piece is a PCR with CGW pro package, I've owned it for about 2 yrs now and has roughly 4500 of not one issue rds.
There is no way am packing a SP01, am 6'1 and 175 my pcr rides in a JM custom kydex right about at my front pocket.