The seat height is the main differences in the two units. There are small design changes to the look of the CST412MF, but they are slight differences. Closed Coupled is another term for a two piece toilet. It basically means the tank and bowl are coupled together.
I have now been with the company 4 years, I know which fixture works best for your lifestyle. In addition to this knowledge, I’m a woodsman, hunter, and overall outdoorsman.