After initial testing at home, they are capable of similar max outputs, with the Hathor pumping out more real lows by a small margin. The SM seemed to roll off sooner giving it a tighter sound. For low mids to mid-mids I would give the nod to the SM but once you're up into the high mids, the switch on the AK makes it the King. You're not stuck with that sound though since that signature upper mid grind is optional (but imminently usable in a mix). The tweeters on both cabs seamlessly extend the highs if that's what you want. They both weigh about the same (23-24 lbs.) but the SM definitely feels like less, mostly due to it being only 11" deep, much easier to walk with. Can't wait to get them to a gig to see how they fit in a mix! Feel free to ask any questions, describing sound with words is obviously not my forte but I'll give it my best shot.