The World War II era German V2 rocket was a frightening weapon. More than 3,000 were fired at various Allied targets, including London, during the war. Without going into a major history lesson here, we all know how the conflict ended, and today Germany builds some of the finest cars on the planet. It also makes some pretty darn fast ones, two of which include the Mercedes-Benz SLS AMG Black Series and the Porsche 911 (997) GT2 RS.

Both are terrifying naturally aspirated (track) weapons.And they sound absolutely wonderful. In fact, the SLS Black Series was named Evo magazine's 2013 car of the year. But how does it compare against another formidable foe: the now discontinued 911 GT2 RS? Evo couldn't resist temptation and put together a little comparison test.