It has, given my set up and room to qualify, much more bass, and absolutely no harshness. The Ref 1000's were great, but this seems to be on another level in my set up. I needed some more warmth, I think it's my very imperfect room that needed help more than anything.
The first impression I got after hooking them up was that the Cary's took hold of the speakers and just throttled them. I play music LOUDLY and we all know how much Maggies need power, these absolutely never ran out.
One thing though, is I am a bit concerned on the amount of current being pulled from the power conditioner. I have an APC S15, and the reading with the Bel Cantos at normal listening levels were consistantly at 42% of peak load. With the Cary's it's at 75%. I turn off the TV (which somehow is the biggest load) now when listening to drop the power level down.