You might find that it seems easier to draw a 66" longbow than a 58" recurve of the same weight; at least that's been my experience. There's less finger pinch, and possibly less stacking with the longer limb length, depending on your draw length. The difference I've experienced has to be subjective, since 40# at 28" is 40# at 28", regardless of how you get there, but I do feel it nonetheless. Definitely nor enough to make a 45# 66" bow feel like a 40# 58" bow, but maybe enough that a couple of pounds of extra weight on the longer bow would feel the same as the shorter bow.