These are pretty different instruments. The Coco can’t do a clean loop/delay, it’s always at least a bit crazy. And the interface is like doing magical incantations… The Octatrack is much more of a precision instrument, clean sampling and sequencing. Something you would program, where the Cocoquantus feels like another musician you’re playing along with.
I have used a Morphagene yet, but again feels really different in terms of sound characteristics and the type of manipulation and control.
I have a Cocoquantus and love it, but it’s definitely not a standard looper or delay effect.