What's the difference between a stone mill and a traditional soymilk machine?

As the name implies, soymilk machine is a machine that specializes in making soymilk. Other soymilk machines can't be used, and their functions are relatively simple. Take my han cun refiner as an example. The biggest difference between it and soymilk machine is the different processing methods. The processing method of soymilk machine is blade crushing, but my han cun refiner is made by imitating the traditional stone mill, and my han cun refiner has many functions, and it can also grind soymilk.