The 97 is my new favorite 45acp platform to shoot at the range but it is the largest in terms of overall size, grip size and weight. The difference in grip/finger reach between the 75b and the 97B is small. The 1911 platform (with VZ grips) is noticably slimmer and easier to handle. I have used the Houge wrap around grips and they will fatten it up so it is more like a CZ. Note the thickness of the 97 grips; you can't get too much thinner.
Not to confuse the issue but if you are looking for a slim, low weight, hi-cap (13rnds) 45 acp platform look at the XD. It makes a great flashlight at night. 
Left-to-right: XD, 75B, 97B, 1911(VZ grips)
Very interesting. When I first was considering a .45 ACP, I shot an XD45 at the range and loved it. However, through a convoluted series of events, I ended up owning two 9mm weapons: a CZ 75 SP-01
and an XD9. I decided to take both the the range and put a couple hundred rounds through each, and whichever one won, that would be my new 9mm weapon.
Well, the CZ took that competition neatly (in a walk, actually). Once I sell the XD, I will be in the market for a .45. Hence, this post.
From your pic above, it looks like the 97B is actually a bit smaller in circumference than the XD. Is that the case, or are my eyes deceiving me? If so, I may end up with another CZ to add to my collection. But before that, I will call around and see who has a 97B for me to pick up and play with.
