E30 Zone

Im probably been blind and cant find any posts regarding my simple question ..
But leather interior, is there a away of telling if the rear bench is from a coupe or convertible by the way stitching runs ( horizontal or vertical stitching ) ??
Thanks

Width...the convertible rear bench is narrower

and its 2 distinct seats as the centres are raised in a convertible (and m3) but the main one is the width

Thanks for quick replies guys ..
These are the seats in question





Cheers

Yep they are coupe seats