Two SUVs with more similarities, such as the body structure, market segment, ground shadow size, height, and maximum occupancy, than differences, like the starting price, horsepower, and fuel economy. First of all, there is a notable difference in the starting price of the 2016 Acura RDX, which is $5,600 less than the base MSRP of the 2015 Lexus RX 350. And finally, although the 2016 RDX has a more powerful engine than the 2015 RX 350, it gets 2 more mpg. Among similarities are the body structure, market segment, ground shadow size, height, and maximum occupancy.