Two Sedans with more similarities, such as the body structure, market segment, ground shadow size, and maximum occupancy, than differences, like the starting price, horsepower, fuel economy, and height. First of all, there is a $33,305 difference in the base MSRP. The 2015 BMW ALPINA B6 Gran Coupe has a higher starting price than the 2016 Cadillac CTS-V. Also, the 2016 CTS-V has a more powerful engine than the 2015 ALPINA B6 Gran Coupe, and it gets 2 fewer miles on a gallon of fuel. And finally, the ALPINA B6 Gran Coupe has a slightly taller body than the CTS-V. Among similarities are the body structure, market segment, ground shadow size, and maximum occupancy.