I think akai really kind of missed the mark on the form factors. The live has the battery and the speaker but is big with regular size pads and all the connections for hooking everything up in the studio while the one is smaller with not as many connections and smaller pads but has no battery or speaker.
I think the idea of having 3 different form factors make sense (i.e. small and portable, regular for use in studio, and big for studio centerpiece), but they need to just commit to what they are and not have features from one creep into the other. Right now the features/size/etc. on the one and live make no sense. I mean, what is next, the MPC XL with a battery?
So yeah, I guess the one with more outputs would make sense as long as they increased the pad size too and didn’t add any portability stuff to it. But then they would have to shrink down the live with less connectivity and smaller pads.