Two Sedans with more similarities, such as the body structure, market segment, starting price, fuel economy, ground shadow size, height, and maximum occupancy, than differences, like the model year and horsepower. First of all, the 2016 S60 pulls more horsepower than the 2013 A4. Among similarities are the body structure, market segment, starting price, fuel economy, ground shadow size, height, and maximum occupancy.