Well if you want to nitpick, the little chrome caps on the front door pulls, the dome light, as well as the interior door handles and most of the switchgear in the dash and steering column are shared. Also the bezels for the headrest posts, the rear view mirror, sunroof cranks...
In the big picture Brad is right, none of the major interior is shared, and nothing in the outer shell but grills, headlamp mounts and the gas cap. And rust of course, but a coupe will generally have more.
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