I have the older checkered grips. I just bought a set of Hoge rubber grips, and they're definitely slightly slimmer all around. VERY comfortable, although I liked the original grip too. They make it much easier for my wife to shoot the gun too.
Maybe since they're new Hogues they match the new factory dimensions, but I'd skip straight to Hogue if I were you. There isn't much to improve on a SIG220 anyway and they cost about the same as a set of factory (something like $20 instead of $10 or $15.)