The Boxster and the Cayman are best on an open and twisty road. As you go faster the perfectly refined controls become more rewarding. The chassis is beautifully balanced with seat-of-the-pants feedback and performance is exhilarating. If you are into wind-in-the-hair motoring then the Boxster is the answer. The Cayman is for the more serious one with somewhat better stiffness and a promise to keep you dry in the wet.