76 keys is a hot topic because it influences my performance directly and so the general sound of my performance.. Many other things like sliders, knobs, buttons also directly influence my performance and should be taken account of together with Sounds, styles, Mediaplayer options, sound edditing possibilities, sample loading memmory... and many more So its not just sound and styles that matter.

Color and looks is offtopic, tough i really like the black look of the new Motif XF above the dull grey of the Motif XS it should not be of any concern when buying a new instrument.