2017 Mercedes-AMG GT Roadster Spied Benchmarking Against Porsche 911 Carrera Cab

The next chapter in the Mercedes-AMG story will be written with the top down [no pun or innuendo intended]. Slated to debut early in 2017, the Mercedes-AMG GT Roadster has been recently caught testing back-to-back with its arch-nemesis, the timeless Porsche 911 Carrera Cabriolet. It’s hard to tell…