Two Hatchbacks with more similarities, such as the body structure, starting price, and height, than differences, like the horsepower, ground shadow size, fuel economy, and maximum occupancy. First of all, the 2016 Chevrolet Spark has bigger and thirstier engine; the 2015 smart fortwo Hatchback gets 2.5 more mpg. Also, the body structure of 2016 Spark is significantly larger than that of the 2015 fortwo Hatchback. And finally, there is a difference in the number of passengers; the Spark seats two more the fortwo Hatchback. Among similarities are the body structure, starting price, and height.