...Just when you think you can say, "If this, then alloy", there is now a CZ-75D Compact that is steel framed and has a safety but also has a P-01 rail on it.
Unless I misunderstood your comments, I don't think so... Unless someone swapped slides, etc. (That can be done!), a "75D" model,, by definition, can't have a safety -- as the D denotes "Decocker." There IS a new CZ P-01
Omega, which gives the owner the option of switching from safety to decocker (or vice versa), but that model has an
alloy frame. The newer alloy-framed guns now have reversible mag releases, but I don't think that's the case with the new steel-framed Compact.
It has been a CZ naming convention for years that the steel-framed 75B Compact is considered a
MODEL, identified by a capital C, ala
Compact while the term "compact" indicates a gun SIZE. (The 40B was considered a compact!).
The frame of the steel Compact model is slightly different than the alloy framed compact; you can see this by comparing the area under/behind the decocker, as that area is thicker than the same area on the steel frames. The P-01 frame is different with a full-length dust cover and accessory rail.
Your larger point is valid, however, as CZ has, from time to time, spit out some oddball guns: full-size frames (steel) with compact slides (known as semi-compacts), alloy-framed compacts with safeties [very rare], and now that they're doing Omega triggers, the output may become even more esoteric. (I've seen a small run of satin nickel CZ-97Bs ... and it is sometimes possible to get some high-gloss blued models.)