IMHO both cars are very . The roadster more so with roof down and though the roadster weighs more(240lbs) due to chasis reinforcement. Nissan did a fantastic job with this and also damping so much so that the both cars are not far off performance and handling wise and there is very little scuttle shake from the roadster
Excerpts of the major differences of note in the roadster are:
- Altered 1st gear ratio (to even up the weight disadvantage ) 13.423:1 vs 13.074:1.
- Exclusive steering column support contributes to sharp steering response.
- A cross-car beam that with gussets at the top and bottom of the A-pillar reinforces the front end.
- Other structural reinforcements such as a center floor V-shaped cross bar connecting the side sills and a triple-member was added to the seating area connecting the sides to the floor structure to provide enhanced rigidity.
- Doors are also added to the reinforcement with special 'door catcher' connectors.
- Front and rear dynamic dampers to hinder vibrations.
However, seeing what Rich-Z has done with the Supra, the coupe will be a better base for extreme tuning due to the inherent stiffness, the ability to add a roll cage for added safety, lack of boot space and the all weather versatility of the coupe as required when you live in Blighty