<< "Vader sat at the controls of his own customized fighter. Unlike the standard TIE, Vader's had larger, angular wings. The rear engine was considerably longer, and the support struts connecting the cockpit ball to the wings were much thicker than standard." -Starwars.com databank >>
Just to comment, Vaders TIE also possessed a hyperdrive - which is why the rear engine was larger and how he managed to escape after the destruction of the death star.