I know neck sizes, the slim taper or 50's neck vary a little with each guitar. Is there any difference between a Gibson neck being listed as rounded vs 50's classic? The non slim taper necks are listed inconsistently on some sites, and I could use some expert advice. Is it all just different verbiage for the same thing? Is Rounded, C Shaped Rounded, 50's classic all the same thing, or do they vary to a certain degree from each other? Should I expect the largest neck to be the 50's classic, and just a rounded neck to be a little slimmer. Thank You so much!