Cajan, I did not compare the two.
This new M-Audio controller offers assignable sliders, buttons, knobs and pads..These are an advantage over the Roland A-37. It also is bus powered via USB. The Roland is not.

Roland is 76 keys, the M-Audio 61.
They both have a good key feel[not as good as the G1000].
The Roland has 128 set up memory, the M-Audio does not.

The M=Auio has 4 zones, the Roland 2..

The Roland has a durability track record, the M-Audio[line] does not..