Hi Scott,
No, my manual doesn't say which sounds are on the 2600 that are not on the 2400....I think if you did a Google search for Technics kn2400 & another one for Technics 2600, you'll get a better spec listing....
I don't have one of the glossy give aways that outlines that info....and as for saving a personal drawbar setting in a preset, I don't know....I haven't played with the drawbars yet....
Maybe someone else will be along who has that knowledge...
Sorry I couldn't help you....
FlutteringBy