I didn't know that. I know that the 981 based Cayman has about 40% more torsional rigidity than its convertible sibling, the Boxster, so I'm a bit surprised. A targa tends to be the compromise, a convertible with more body rigidity.
i like it but its a targa not a roadster. A roadster is an open (without a fixed roof or side weather protection) two-seat car with emphasis on sporty handling. While roadsters usually have soft-tops, retractable hard-tops are becoming more common