Speaking of John Myung, wasn't he field-testing some kind of variation on the Bongo 6? It had what looked like recessed knobs or buttons and possibly also a narrower string nut. I seem to recall him photographed with that bass.
Yeah, those are definitely the new tuners and the neck does look slightly roasted but I can't tell if it is a gloss finish or matte finish? It could also just be a natural neck with the lighting making it look roasted.