A single-hole faucet and a thermostatic faucet are two different types of faucets used for different purposes.

A single-hole faucet is a type of faucet that has a single mounting hole, and is typically used for sink or basin applications where a small amount of water is needed. The water temperature and flow rate are controlled by two separate valves.

A thermostatic faucet, on the other hand, is a type of faucet that is designed to maintain a constant temperature of the water, regardless of changes in the water pressure or flow rate. It uses a thermostatic valve that controls the flow of hot and cold water to maintain a consistent temperature. This type of faucet is typically used in applications where a consistent water temperature is important, such as in a shower or a bathtub.

In summary, the main difference between a single-hole faucet and a thermostatic faucet is the way that the water temperature is controlled. A single-hole faucet uses two separate valves, while a thermostatic faucet uses a thermostatic valve to maintain a constant temperature.