What we have here are two SUVs from Acura with some differences, such as the starting price, horsepower, and maximum occupancy. First of all, there is a notable difference in the starting price of the 2016 Acura RDX, which is $7,195 less than the base MSRP of the 2015 Acura MDX. Also, the 2016 RDX produces fewer horsepower than the 2015 MDX. And finally, you'll seat two more passengers in the MDX than in the RDX. Among similarities are the body structure, market segment, fuel economy, and height.