Two SUVs with more similarities, such as the body structure, starting price, ground shadow size, and maximum occupancy, than differences, like the horsepower, fuel economy, and height. First of all, a bigger engine usually means less mpg. But the 2016 Mazda CX-3 has a more powerful engine and it gets 2 more mpg than the 2015 Chevrolet Trax. And finally, the 2015 Trax has a slightly taller body than the 2016 CX-3. Among similarities are the body structure, starting price, ground shadow size, and maximum occupancy.