Two SUVs with some similarities, but otherwise different in most aspects such as the powertrain, market segment, starting price, horsepower, fuel economy, ground shadow size, and maximum occupancy. First of all, the 2016 Acura MDX has bigger and thirstier engine; the 2015 Audi Q5 Hybrid gets 4 more mpg. Also, there is an $8,885 difference in the base MSRP. The 2015 Q5 Hybrid has a higher starting price than the 2016 MDX. In addition, the MDX is slightly larger than the Q5 Hybrid. And then, the Acura MDX seats two more passengers than the Audi Q5 Hybrid. Among similarities are the body structure, market segment, and height.