Initially I noticed some muddiness, sometimes slightly poor PRaT and loss of clarity when I first got the amp. These were minor and I didn't think it was fair to mention till it's had some burn-in --- and after 10 hours I realise I was right; all these complaints are falling away and the amp reaches a new level.
Against the MKIII, the Move has a slightly smoother, warmer sound with a more pronounced bass and low-mid. The nasty sharp highs I occasionally experience are gone (e.g. hi-hat / the guitar slapping on Jack Johnson - Banana Pancakes), which is a welcome change, allowing higher volumes without being blasted by symbols, hi-hat...
Detail is still good, but a small amount is perhaps traded for smoothness and warmth. The smoother sound is more pleasing to the ear and makes the amp more forgiving to poor recordings or low-bitrate songs.
As I mentioned before, I really like the way it handles vocals, especially female. They seem richer and more natural.
Strangely, I find separation of instruments can sometimes be better on the MKIII, while the Move has better placement. Really weird!
I'm not a fan of crossfeed but, with the Move, it's growing on me. The crossfeed seems considerably better on this vs the MKIII for some reason.
I think the most impressive thing about the sound of the Move is how it manages to be warm, smooth AND detailed at the same time. I find some high-detail equipment unpleasant to use daily, but the Move produces a very listenable, full sound.
Below I've pasted my prior comments on the device itself.
- My MacBook Pro doesn't complain that it's drawing too much power from the USB port like it does with the MKIII when you plug it in unpowered.
- The Move is MUCH shorter than the MKIII. I am surprised how small it is!
- The volume knob is considerably more pleasant to use than on the MKIII.
- The build quality and finish are excellent!