Two Sedans with more similarities, such as the body structure, starting price, height, and maximum occupancy, than differences, like the horsepower, fuel economy, and ground shadow size. First of all, the 2016 Buick Verano has a more powerful engine than the 2015 Mazda 6, and it gets 6.3 fewer miles on a gallon of fuel. And finally, the 2016 Verano has a slightly smaller body than the 2015 6. Among similarities are the body structure, starting price, height, and maximum occupancy.