Two Sedans with more similarities, such as the body structure, market segment, ground shadow size, height, and maximum occupancy, than differences, like the modifications, starting price, horsepower, and fuel economy. First of all, the 2016 BMW 5 Series is priced $9,140 lower compared to the base MSRP of the 2015 Cadillac CTS Vsport. Also, the 2015 CTS Vsport has bigger and thirstier engine; the 2016 5 Series gets 5 more mpg. Among similarities are the body structure, market segment, ground shadow size, height, and maximum occupancy.