Two Hatchbacks with some similarities, but otherwise different in most aspects such as the starting price, fuel economy, market segment, horsepower, and maximum occupancy. First of all, there is a notable difference in the starting price of the 2016 Mazda 3 Hatchback, which is $15,625 less than the base MSRP of the 2015 Chevrolet Volt. Also, the 2016 3 Hatchback has a more powerful engine and gets 67 mpg less than the 2015 Volt. In addition, you'll seat one more passenger in the 3 Hatchback than in the Volt. Among similarities are the body structure, ground shadow size, and height.