But seriously, just bite the proverbial bullet and pony up for the SIG as long as you have man hands. You won't regret it.
In order:
-I've yet to see one case where a CZ bests a SIG, except when budget is the consideration.
-If the slide catch bugs you, get your damn thumb off of it. You shouldn't be using it anyways. If you don't want a black one, get a nickel or a stainless one.
-If you don't want an alloy frame, get a stainless one.
-If the "high bore axis" (I LOOOOVE that phrase, I can tell exactly who's going to use it!) bothers you, then practice is your friend. Recoil is a part of life. I don't know what to say about the finish concern, because I plain don't agree, but if you're afraid of scratches, then back to the stainless option! (Or just leave it in the box to admire.)
But... If one fits your hand better than the other, that should make the decision for you. The rest of these reasons are, IMO, bs.