The gun doesn't have a firing pin block, and the trigger is arguably better out of the box. But triggers vary.
The gun also has the LPA Adjustable sight, a mag brake that lets the mags drop free, ambi controls, and an extended mag release (not extended much, though.)
Most of this can be had with the SA model for less.
It is my understanding -- perhaps not correct -- that the internals are given a different hardening treatment, too. At one time I read that the internals were given more attention when fit/assembled -- but also don't know that to be correct, either.
Mine was my second CZ, and its absolutely accurate, reliable, and after a little trigger work, has a very good DA/SA trigger.
(I later added a Champion sear and had to replace the disconnector. The gunsmith said the sear was very "hard" and difficult to fit.)