Two Coupes with more similarities, such as the body structure, market segment, starting price, ground shadow size, and height, than differences, like the horsepower, fuel economy, market segment, and maximum occupancy. First of all, the 2016 Mercedes-Benz AMG GT has a more powerful engine and gets 10 mpg less than the 2015 BMW i8. Also, there is a difference in the number of passengers; the 2015 i8 seats two more the 2016 AMG GT. Among similarities are the body structure, market segment, starting price, ground shadow size, and height.