Two Sedans with more similarities, such as the body structure, market segment, starting price, ground shadow size, height, and maximum occupancy, than differences, like the model year, market segment, horsepower, and fuel economy. First of all, the 2016 LaCrosse has a more powerful engine than the 2014 Avalon, and it gets 4 fewer miles on a gallon of fuel. Among similarities are the body structure, market segment, starting price, ground shadow size, height, and maximum occupancy.