682g and 1240g.

You aren't going to use a keyboard case?

I would assume more people using Final Cut Pro will use a keyboard case, but for mobile music production, it there may be more people willing to go without the keyboard case, particularly if you are mostly using it to noodle down ideas, use the on screen instruments, etc.

for music production? I can see how you'd carry a midi keyboard but no keyboard for typing.

Real musicians type on a midi keyboard. I mean their text doesn't make sense because their alphabet has only seven letters, but still.

(I jest!)

Well, you have 7 letters, but you can also use the black keys for keyboard shortcuts.

And pedals! I've half-seriously considered experimenting with an expression pedal as a vertical scroll controller for desktop applications, using a second pedal to switch between relative (pedal position relative to center → scroll velocity, zero movement when pedal position is centered) and absolute (pedal position → page position, zero movement unless pedal position changes) modes.

For wide multicolumn IDE/text-editor layouts, spatially-mapped fader banks and/or organ drawbars might also make useful scrollers.