Two Sedans with some similarities, but otherwise different in most aspects such as the horsepower, fuel economy, ground shadow size, model year, and height. First of all, there is a difference in model years. The is 2 years newer. Also, the 2014 MKS has bigger and thirstier engine; the 2016 C-Class gets 6.5 more mpg. And finally, the MKS is both significantly larger and slightly taller than the C-Class. Among similarities are the body structure, market segment, starting price, and maximum occupancy.