Two Sedans with some similarities, but otherwise different in most aspects such as the ground shadow size, model year, horsepower, and height. First of all, the is a newer vehicle by 2 model years. Also, the 2014 MKS pulls more horsepower than the 2016 IS 350. And finally, the IS 350 body is significantly smaller than the MKS, and in addition to that, it's also slightly shorter. Among similarities are the body structure, market segment, starting price, fuel economy, and maximum occupancy.