The blade thickness of my SFNO-LEs range from .224" to .228" while my one ASH1-LE measures .221". The biggest difference, other than blade length, is the handle shape. Different overall shape and angles, of course, but also a lot more handle thickness variation on the ASH1-LE -- i.e., it's curvier with more 'ins' and 'outs', to throw in some technical terms ;-)