They are the same shape as a 5-window but a different thickness. I forget which is thicker but someone will know. The difference is minor.
The rear garnish moulding is noticeably thicker for the 5 window coupe. There is also a difference from early to late sedan rear mouldings, it is in the number of mounting screws.
The depth of the sedan garnish is thinner, I imagine to afford a bit more headroom. The coupe measures 1 3/8” and the sedan is only 3/4”.
The deeper garnish on the coupe accommodates the wood surround that facilitates the roll down window.