but I also noticed the glass on the 2+2's are in fact shorter at the corner near the b pillar.
I own a set of JDM mirror coat tops which only came on 2+2 models. I was curious to see if it was just the glass that was different or the metal molding portion. So I removed the 2+2 glass and mounted it to a spare 2+0 metal molding. While it did mount successfully, there was about a half inch gap between the end of the metal and the glass. Both the glass and the metal have different measurements at the rear corner.