Alright, on first listen, as a relative 24-bit newbie, just over headphones - can't get this fired up on the full stereo tonight - and having no real reference for the 722 or Mytek, here's what I hear...
SOURCE A
Sharper attack in highs, smoother decay, better detail - noticable in percussion hits
Greater detail and more up front - guitar, keyboards, vocals
Bass more precise, not as round, extension...?...dunno, tough to say over headphones
More coherent soundstage
SOURCE B
Fuzzier attack in highs, spittier decay = fatiguing for me
Mids not as detailed or clear & crisp as A (guitar, keyboards, vocals) - mid-low emphasis maybe muddies up the mids a bit to my ears?
Stronger low end, rounder, extension...?...dunno, tough to say over headphones
Normally, one source will sound more "hyped" than the other to me, though in this case neither seemed terribly "hyped". But A seems brighter and more detailed overall, or B somehow seems a little muffled / veiled relative to A.
If I had to guess, I'd say Source B = 722, and A = V3/Mytek.
FWIW, playback is: PC > Waveterminal 2496 > smART D/IO > AKG K501s