we wont know fully until it is released so its pretty impossible to say what the difference will be.....just have to wait and see.

the current midjay is a multimedia player that has the ability to play styles that can be controlled via a keyboard (play sounds and change chords). it was never intended to be a replacement for Ketrons arranger modules.

wether the MidJay Pro will have more performance features we will just have to be patient.