Two Sedans with more similarities, such as the body structure, market segment, ground shadow size, height, and maximum occupancy, than differences, like the model year, starting price, horsepower, and fuel economy. First of all, there is a notable difference in the starting price of the 2016 Honda Accord Sedan, which is $8,430 less than the base MSRP of the 2013 Buick Regal, which is three model years older. And finally, the 2013 Regal has bigger and thirstier engine; the 2016 Accord Sedan gets 5 more mpg. Among similarities are the body structure, market segment, ground shadow size, height, and maximum occupancy.