So, what are we looking at here? A traditional wagon with a twin-turbo V-8 pitted against a squished one from the House of Zuffenhausen that, besides the twin-turbo V-8, packs a hybrid system. The Porsche is over $190,000 while the Merc starts at little over $110,0000. While you might as well buy the E63S and head for your nearest Porsche dealership to buy an $81,000 718 Cayman GTS, things aren't ever that simple, right? Porsche decided its Panamera four-door sedan could use some extra practicality and the Super Turismo wagon was born. It's sleeker than most wagons but this doesn't scare Mercedes-Benz AMG, which has been making insane family carriers for the better part of three decades.