The front seats will fit-in but! I have noticed a difference in the seat AIRBAGS in the past
, the seat-bags fitted in the cabriolet are a little longer / bigger (this must be for a reason, probably a very good one
, I presume to protect the occupants a little more) hence some adds say not commpatible with cabriolets when selling the front seats (eventhough the seats look the same).
The rear seat base is a little narrower as someone has said but not by much, however it is also deeper by about 1 inch because of strengthening panels hence the seat base is a little deeper but both the carpet & centre console are slightly shorter than in the hard-top models (sunroof models inc).
The rear seat backs are totally different.