[klodolph]

I think of the Montage/et al as fitting into the synth category. I have an older keyboard like the Montage.

There is feature differentiation, sure. But I think the biggest difference between product lines is the controls. Arranger keyboards need convenient buttons for changing song sections. Synthesizers need dedicated controls for sound design. Stage pianos have dedicated buttons for the common sounds—acoustic piano, electric piano, and electric organ.

If there is a keyboard that “does it all”, I’d guess that it’s something like the Genos. It costs a couple grand more than the Montage.