Two SUVs with some similarities, but otherwise different in most aspects such as the starting price, horsepower, fuel economy, ground shadow size, and height. First of all, the 2015 Infiniti QX50 is priced $6,900 lower compared to the base MSRP of the 2016 Lexus RX 350. Also, the 2015 QX50 has bigger and thirstier engine; the 2016 RX 350 gets 2.5 more mpg. And finally, the QX50 body is slightly smaller than the RX 350, and in addition to that, it's also shorter. Among similarities are the body structure, market segment, and maximum occupancy.