Two SUVs with some similarities, but otherwise different in most aspects such as the horsepower, fuel economy, ground shadow size, and height. First of all, the 2015 Infiniti QX50 has a more powerful engine than the 2016 Cadillac SRX, but it gets 1.5 more miles on a gallon of fuel. And finally, the 2016 SRX body is slightly larger than the 2015 QX50, and in addition to that, it's also taller. Among similarities are the body structure, market segment, starting price, and maximum occupancy.