1. American coffee is a kind of black coffee, which can be divided into hot American coffee and iced American coffee, but black coffee is not necessarily American coffee. American coffee is black coffee made by using drip coffee pot, which is made by adding a lot of water to Italian concentration. Black coffee refers to coffee without milk, sugar and anything, also called black coffee.

2. Inside black coffee is espresso, which is adapted from Italian coffee in the United States. American coffee is a branch of black coffee.