I have a couple of older Gibson A models and a Gibson F-9. I find that when playing the older A models that my hand is more comfortable than on the F-9 (when playing for more than a few hours). Initially I thought that it was because of the V - shape neck on the F-9 and thought about shaving/sanding it down. After lurking around here for a few months it hit me that it may be that both A models have a slightly wider neck when measured at the nut.
What are the neck widths on the various current Gibson models?
Sorry about the long post - lot of cafeine this afternoon!