I'm most assuredly not an expert but I understand the reason people think the CZ75 and BHP are closely related is they do share a similar manual of arms and profile. No denying that. But I think there's enough differences to not call it a copy. I mean a lot of pistols before 1975 were inspired by the novel things John Browning came up with (Moses was his middle name after all). When you really boil it down there's not a ton of ways to improve upon the essentials of a tilting barrel, short recoil and breech lock he did with in the 1911 and the barrel bushing was one, which was changed in the Hi-Power.Good points made.
I always understood that the original CZ’s design was heavily influenced by and inspired by the Browning. It used the Browning linkless cam locking system, similar to that used in the Browning Hi-Power pistol, where the barrel and slide are locked together on firing, using locking lugs milled into the barrel mating with recesses in the roof of the slide. It also had a manual safety similar to that of the Browning Hi-Power.
FWIW, the Firing pin block was added in the 90’s, wasn’t in the original.
In any event, both are great classic 9’s and I’d happily take either one.
To be picky though, some of the stuff compared below is pretty generic. I suppose it just helps to show the importance of John’s original and enduring Hi Power design.
Both are chambered for 9mm. (Later versions of both are also chambered in .40 S&W.)
Both were conceptualized for military use.
Both are similar in size & weight, with the CZ being slightly larger.
Both have a 1:10 twist.
Both utilize barrels with locking lugs, which is straight from John M. Browning.
Both are recoil operated.
Both have the mainspring below the barrel.
Neither uses a detachable barrel bushing.
Both pistols' grip panels are secured with one screw each.
Both have external hammers.
Both have thumb safeties.
Both are capable of cocked-and-locked carry.
Both use detachable double-stack magazines.
Both use external pivoting spring-loaded extractors, although the early Hi Powers used an internal one.
Both use pivoting triggers.
Both have a relatively few number of internal parts compared to some other designs.
Both guns have lightening cuts on the front of the slide. (Later versions of the CZ-75 do not.)
Both guns (CZ-75 Pre-B) use a slide stop retaining plate to secure the firing pin and spring.
Both guns use a push-button magazine release located at the rear of the trigger guard.
Both guns originally came with ring hammers. (The Hi Power and CZ-75 were produced with spur hammers for a number of years. CZ went back to an abbreviated ring hammer. The Hi Power used the old factory ring hammer in the Practical model.)
Both use a one-piece feed ramp.
Both have been copied and used outside of their respective nations of origin.
So far it would seem that the Hi Power and the CZ-75 are like peas in a pod, but there are plenty of differences too.”