Two Sedans with more similarities, such as the body structure, market segment, ground shadow size, height, and maximum occupancy, than differences, like the starting price, fuel economy, and market segment. First of all, there is a notable difference in the starting price of the 2016 Tesla Model S, which is $49,700 less than the base MSRP of the 2015 BMW M6 Gran Coupe. Also, you get 82 more mpg with the 2015 M6 Gran Coupe than with the 2016 Model S. Among similarities are the body structure, market segment, ground shadow size, height, and maximum occupancy.