The SA also has a different frame than the regular 75 that allows a higher grip, as well as an ambi safety, an extended mag releas, and no mag brake (so they drop free) if those things matter to you. Personally, I like the looks and ergonomics of the SA better than the standard B.
As for the trigger, on my SA, it was a little rough when i first got it, but after several hundred dry fires and about 400 rounds, it got much lighter and smoother. Now, it has a little bit of takeup (that could be corrected with the metal trigger that CZ sells) and some creep, but breaks predictably.