Yes They are different. I have both a 5w coupe and cabriolet. The cabriolet ones I have are definetly original henry's and they have no p/n on them. The reason they are different is because the entire cabriolet rear section is aprox 2 inches lower than the 5w and roadster. The same deck/rumble lid is used on the cabriolet, but because the whole rear section is lower, the rumble lid sits lower and therefore describes a different arc as it rotates to the open position. If you compare the back panel (below the rumble lid) you can readily see the difference. The cabriolet panel is about 2 inches shorter (8 inches)than 5w/roadster panel (10 inches). The cabriolet rumble lid brackets (A shaped) are shorter and also the L shaped inside mounting brackets where they pivot are shorter than 5w/roadster brackets. Because everything is lower on the cabriolet (relative to the floor) the cabriolet rumble lid stop brackets that mount to the floor are also shaped dirrerently and are correspondingly shorter. The Murray bodied 3w deck /rumble lid is wider and totally different than the 5w/roadster/cabriolet lid and the rumble lid brackets are 3w only and will not fit any other body style. Interestingly enough I have emailed and had phone conversations to one well known aftermarket supplier of these rumble bracket kits and informed them that advertising these as 5w/roadster/cabriolet kits will not work on cabriolets, and they have said they will correct their ads. Sadly,they still to this day have not changed their ads. To the best of my knowledge there is no one reproing the cabriolet CORRECT brackets. The aftermarket 5w/roadster arms are cast iron and so shortening them to work on a cabriolet would be extremely difficult. Hope this clears up some questions in this regard. The cabriolet body was made by briggs and although it is similar in apperance to a 5w coupe & roadster, nearly every body panel is different. It being lower gives it a swoopier sportier appearance in my opinion and is my favorite, Pete the true blue 32 man