Hi 96/44 !!
You've got two GREAT choices there. They are BOTH fantastically accurate. The only thing that I'd say is that as much as I like CZ's .... the 97B is an absolutely GIGANTIC gun. From your post, it seems like you've handled both guns in person, and they're both OK with you. If so that's great, but if you haven't physically handled the 97B, I would highly recommend doing so. I almost bought one years ago sight unseen, and then I got to handle one, and I was blown away at how large it was, and I have large hands also.
Having said that, and admittedly never having fired personally a 97B, I don't think you'd go wrong either way. My guess is that accuracy would be about exactly comparable. One thing I would say though, is that if you ever have to get rid of one of these guns .... the Sig will go in a week, and it might take months for the CZ to sell. Trade value would also be MUCH higher on the 220, just because of it's stellar reputation in absolutely all areas.
To be honest, this time I think I'd have to vote against the CZ. It's just too big, too unknown (within the 45ACP arena), and it is kind of an oddball in the CZ lineup. Nowhere near like the well-known mainstream 75B platform. I've never even SEEN a 97B that was outside of a gunstore. Lots of guys at my range have 220's. They're pretty much mainstream.
Yeah .... I'd have to go with the Sig. Probably not much price difference either I'd imagine.
If you're interested ... there's a gun store a few miles from me that had TWO used P220's a month or so ago. If you're considering a 220, and used is OK, you may want to call him and see what he'll do. If interested, PM me and I'll hook you up.
Great luck on either gun .... two very good SA/DA 45ACP's !!
PS .... the Sig will undoubtedly have the best trigger
out of the box, and probably forever. CZ's are known for needing a few thousand dry-fires (the more the better) before their trigger gets to be where it should be. It really makes your finger tired .... and I'm not kidding at all.
REV