Two Sedans with some similarities, but otherwise different in most aspects such as the model year, starting price, horsepower, fuel economy, and ground shadow size. First of all, the 2016 Acura TLX is priced $8,625 lower compared to the base MSRP of the 2013 Lexus IS 350, which is older by three model years. Also, the 2013 IS 350 has a more powerful engine and gets 4.5 mpg less than the 2016 TLX. And finally, the body structure of TLX is slightly larger than that of the IS 350. Among similarities are the body structure, market segment, height, and maximum occupancy.