Two Coupes with some similarities, but otherwise different in most aspects such as the modifications, horsepower, fuel economy, market segment, ground shadow size, height, and maximum occupancy. First of all, the 2015 Dodge Challenger SRT Hellcat has bigger and thirstier engine; the 2016 Mercedes-Benz E-Class Coupe gets 6 more mpg. Also, the 2015 Challenger SRT Hellcat is both slightly larger and taller than the 2016 E-Class Coupe. In addition, there is a difference in the number of passengers; the E-Class Coupe seats one more the Challenger SRT Hellcat. Among similarities are the body structure and starting price.