It is different and it would matter, exactly how much I don't know. HSB are definitely the most gape restricted of the "bass" though. Since, we're at it, how about walleye gape since it seems to be a more and more commonly stocked predator into ponds these days... Bill, you happen to have that info handy as well? I know, CC have also been researched on mouth gape. I think Theo Gallus did a lot of work on that. I think crappies have a bigger gape than HSB do. I sure know a 15" crappie sure has a giant mouth! I honestly think a GSF has a bigger mouth than a HSB of the same size...