Two Sedans with more similarities, such as the body structure, market segment, ground shadow size, and height, than differences, like the fuel economy, market segment, starting price, and maximum occupancy. First of all, there is a notable difference in the starting price of the 2017 Tesla Model S, which is $17,000 less than the base MSRP of the 2017 Porsche Panamera. Also, the 2017 Panamera is more fuel efficient; it gets 77.5 more mpg than the 2017 Model S. In addition, the Model S seats one more passenger than the Panamera. Among similarities are the body structure, market segment, ground shadow size, and height.