I was changing seat rails on the POS Vert I bought,and I bought coupe rails,figuring they would be ok and the same.
Well,it turns out the Inside Passenger rail is slightly different,as it is flat on the front and 90 degree down at the back of the rail.
The Coupe rails are Flat on front and flat on back.
Just thought I would post with this little bit of Info.

 

guys swap seats back and forth,cant say I recall anyone having a issue

I have 2 sets of aftermarket FC seat rails and they fit in my vert no problem, nothing vert specific about them

 

I have a pair of '90 GTU seats in my convertible, and i didn't have to change the rails. The only difference I noted was the convertible seats had 1/4" spacers between the rail and the seat bottoms.