So regardless of specs being the same, I get that the M18 all things equal would give more umph. Is the M18 ever an issue with size given the larger pack mount? I know they are both the same length but the "hidden" M12 battery design(assuming no XC) and rake of the handle give me the impression that it may fit certain places that the M18 won't?
Did you ever get a stubby? I see you got the right angle and returned it.