The answers to your questions are yes and yes.
Muzzle flip/snap is more for the .40 than the 9mm as you'd expect. However the answer to your second question is why I didn't say significantly more (of course "significantly more" is subjective). The all steel CZ75B is awesome in this respect, I can't say enough about the 75B.
Before I continue my conscience leads me to insert my standard disclaimer here: poster is a newbie, while he's a nice guy actual performance may vary. I've only fired 500 rounds down range in my entire pistol career to date.
In order to put my definition of "significantly more" in context, my run up to purchasing the CZ included rental guns at the range (some in 9mm some .40): SW M&P, Glock, HK USP, Sig 226, and Beretta 92FS. Firing a few of these in .40 sealed my decision that I needed to buy a 9mm as my first handgun -- or so I thought. The reason being I didn't think I could or wanted to deal with the extra muzzle flip of the .40.
To make a short story longer, I finally got my hands on a rental 75BD in 9mm and immediately fell in love. I soon stumbled on the down coversion barrel option and made the decision to buy a 75B .40 assuming if it was too much I'd have the 9mm to fall back on. I am very glad I made the call as the .40 is awesome and I can't wait to run the kinks out of the 9mm setup too!
As you can see I love my 75B
