Well, I'm sorry to say that I haven't done the careful research to determine just how accurate my various CZ's are. I normally shoot at 7-10 yards, and the -SA can shoot through the same hole if I do it all properly.
CZ's come with a test target from the factory, with 6 shots fired.
My 75B-SA reported a dispersion area (max center-to-center) of 3.7" at 25 meters (27.3 yards), which would be 6.8" @ 50 yards.
My 85 COMBAT reported a dispersion of 2.3" @ 25m (27.3y), which would be 4.3" @ 50 yards.
This was done with S&B ammo, nothing special.
In this TFL thread, I discussed the relative advantages of the various CZ's:
http://www.thefiringline.com/forums/showthread.php?s=&threadid=137943
(look for the post by "smithz")
The 75B-SA trigger will be lighter and probably better than the regular 75B trigger. The 85 COMBAT trigger has no firing pin block to deal with, so it can have better reset and smoother take-up. The adjustable sights on the 85 COMBAT are very nice.
To get the best of both, I'm having the CZ "Champion" single-action-only trigger/sear and low-mass speed hammer put in my 85 COMBAT.
To have adjustable sights put on the 75B-SA, you will either need to have the slide milled, or have the LPA set that goes past the rear of the slide installed.
-z