With regard to the interior, some of the door trim pieces match the center console's "titanium" look (not readily apparent in the linked gif). Also, the steering wheel has a slightly different perforated leather wrap in certain sections. The seats are have a perforated grey (not black) suede-like finish on the seating surface.
Although I liked the standard seats better for comfort, I prefer the aesthetics of Z interior because the two-tone look seems a bit more stylish than the all-black interior in my prior NSX. Of course the interior is functionally the same, so it's just a matter of personal preference.
--twc
[This message has been edited by Number9 (edited 24 January 2001).]