As the first Porsche with its engine in the middle to wear the GTS badge since the 904 Carrera of 1963, the Boxster GTS supplants the S model as the top spec version of the drop top. Still often regarded as the 911's little brother, the latest iteration of the Boxster and Cayman sees a new level of performance prowess. But can this new, sharper Boxster GTS able to outshine the venerable 911 Carrera?