Differences between the base Boxster and the Porsche Boxster S lay primarily in the powertrains. The Boxster S is more powerful, and it comes with a standard six-speed manual transmission as opposed to the five-speed gearbox on the base model. The Boxster S also boasts slightly larger front brakes to compensate for its greater power, and gets 18-inch wheels and tires instead of the Boxster’s standard 17-inch rims and rubber. Finally, high-performance Porsche Ceramic Composite Brakes, valued for their light weight and fade resistance, are only available on the Boxster S.