I have had a bunch of CZs, and also have a Browning Hi-Power. There's no similarity in design, just some similarity in appearance.
The concern about slide stop breakage is more heard about than experienced -- it can happen, but it's not really all that common. And, when it happens, the part isn't that expensive.
Years back it was recommended that folks move to heavier recoil springs to protect the slide stop. That may have accelerated damage, as the slide when the slide goes back, is retarded by both the recoil spring AND the hammer spring so the slides top -- which retards the barrel -- doesn't take a big hit. When the slide slams forward (and is stopped by the slide stop) nothing retards it's movement except the round being chambered. To make matters worse, if the mag is empty and the slide is released, it will hit with full force!!
I've been shooting CZs for years, and have an 85 Combat with maybe 10K rounds through it. The only slide stop I've broken was because I mistakenly put an 85 Combat slide stop in a CZ Compact when swapping slides at the range. The slide stops are slightly different because the 85 Combat has an ambi-slide stop lever which is smaller on the far end (where it fits into a lever on the 85 Combat/85B frame); when put in the wrong frame (as I did it), the smaller end is not properly supported in a non-ambi frame. In that case, the barrel lug hits the slide stop at a slight angle, and that causes stress where it's not supposed to happen. Clink.)