73 Rear window gasket?

Hello! Drove my car through a torrential downpour today(first time its rained since I got it). It started raining inside the car from the back window. The car is a 73 dart swinger that was originally a vinyl top car. The previous owner removed it it and all the trim to make it a non vinyl top car. If I replace the rear gasket do I have to still use the vinyl top style gasket or can I use the ordinary gasket? I guess what im asking is, is there any difference between the two styles in the glass or is it just the gasket and trim?
I've never heard of any different window for a vinyl top than a hardtop? I think it's just gasket and trim.