On this episode of Head 2 Head, Jonny Lieberman looks at a type of car that Germany does better than anyone else: the Super Sedan. The Porsche Panamera Turbo has long been one of Motor Trend's favorites. Massive, ferocious, surprisingly nimble, and if your checkbook's got the overhead, totally luxurious. But don't discount Audi. Ever since the S8 showed up, Audi has shocked the car world by making such a big car so dang fast. The only thing that could even compete was the Panamera Turbo. The RS7 comes with an even more powerful version of the familiar 4.0-liter twin-turbo V-8 -- 560 horsepower to be exact. For 2014, Porsche's seemingly underrated 4.8-liter twin-turbo V-8 is up 20 hp to a more-than-modest 520 hp. Faced with tough choices after the two hit the test track and a canyon road, Jonny enlists the help of resident Motor Trend Hot Shoe Randy Pobst to figure out which super sedan is best.