Two Sedans with more similarities, such as the body structure, market segment, starting price, height, and maximum occupancy, than differences, like the model year, horsepower, and fuel economy. First of all, a bigger engine usually means less mpg. But the 2013 S6 has a more powerful engine and it gets 1.5 more mpg than the 2016 LS 460. Among similarities are the body structure, market segment, starting price, height, and maximum occupancy.