I imagine people that can draw could doodle on a napkin at lunch, then take that doodle home a paint it more broadly. That's how I feel with iMaschine. I can get some basics down while I'm ignoring people on the phone at work, then load it up when I get home. I'm pretty sure I'd prefer iMPC if I had one of the new MPC's to use when I got home.

Functionality-wise, I prefer selecting sounds and kits in iMaschine over that scroll function in iMPC.