Two Sedans with more similarities, such as the body structure, starting price, ground shadow size, and maximum occupancy, than differences, like the model year, horsepower, fuel economy, and height. First of all, the 2014 Sonic Sedan has bigger and thirstier engine; the 2016 Accent Sedan gets 1.5 more mpg. Also, the Sonic Sedan has a slightly taller body than the Accent Sedan. Among similarities are the body structure, starting price, ground shadow size, and maximum occupancy.