Two Sedans with some similarities, but otherwise different in most aspects such as the model year, starting price, horsepower, ground shadow size, fuel economy, and height. First of all, there is a $15,905 difference in the base MSRP. The 2016 Kia K900, a newer vehicle by three model years, has a higher starting price than the 2013 Cadillac ATS. Also, the 2016 K900 has bigger and thirstier engine; the 2013 ATS gets 4.2 more mpg. And finally, the ATS is both significantly smaller and slightly shorter than the K900. Among similarities are the body structure, market segment, and maximum occupancy.