Yeah....so stupid from Motu!
The M6 has 8 mono outs / 4 stereo outs (4 line out and 2 heaphones out), exactly as the SSL12, but with the SSL you got 4 stereo mixes / 8 mono submixes / cue mixes and 8 real usable outputs, with the Motu you have only 4 outs - 2 stereo mixes (1/2 and 3/4....didn't...