I could be wrong, but I thought that the Midiman brand
name was
retained for the more consumer-oriented products, M-Audio for those
aimed at the professional market.
I don't it's as simple as that - the Revolution card is branded
M-Audio, for instance.
http://www.m-audio.com/products/midiman/
http://www.m-audio.com/products/m-audio/
But as long as we know which ones we are talking about...
Cheers
Daniel