quick mention re/ the keys version of A4 … having a keyboard on it removes one extra midi device in the chain, and so the playing/sequencing maintains that one extra level of tightness.
also it could be really fascinating to see what kind of keyboard semi-weighting key quality there is,
from what few examples i have listened to, the A4 reverb truly is a thing of beauty. many, many OT owners have petitioned for the same reverb to be ported to the OT, although the algorithm may just be too much. it is almost a two-slot effect.
edit: also, the A4 records a note-off in realtime recording, whereas the MnM doesn’t. not to say the MnM isn’t awesome … really the Monomachine is beautiful. totally different creature to the A4.