Two Sedans with more similarities, such as the body structure, fuel economy, ground shadow size, height, and maximum occupancy, than differences, like the starting price and horsepower. First of all, there is a notable difference in the starting price of the 2015 Mazda 3 Sedan, which is $1,695 less than the base MSRP of the 2016 Honda Civic Sedan. And finally, the 2015 3 Sedan has a more powerful engine than the 2016 Civic Sedan. Among similarities are the body structure, fuel economy, ground shadow size, height, and maximum occupancy.