Two SUVs with more similarities, such as the body structure, market segment, starting price, and height, than differences, like the horsepower, fuel economy, and maximum occupancy. First of all, the 2016 Infiniti QX70 has a more powerful engine than the 2015 Acura MDX, and it gets 3.5 fewer miles on a gallon of fuel. And finally, the 2015 MDX seats two more passengers than the 2016 QX70. Among similarities are the body structure, market segment, starting price, and height.