As I read somewhere else on this board, sonically the units sound the same, technically they allowed for deeper editing for more complicated DSP, however, I would have hoped that they would have increased the looping time, even by tripling it, it still wouldn't come close to the capacity of the JM4, which someone noted that the increase of looping time would encroach on JM4 sales... bullocks!
If you're going to put out something new, make it a game changer, not a polished turd.
What they've done is like going to a nice restaraunt and ordering pasta with alfredo and it comes to the table with red sauce... they take it back into the kitchen, rinse the red sauce off, put the alfredo on it, re-heat it in the microwave and re-serve it to you.
