What's the essential difference between cappuccino, latte and mocha coffee? how is the price? Does it taste good?

When it comes to the essential difference, I don't think so, because it's all a mixture of milk and coffee, but the proportion is different. Cappuccino and latte feel very similar.

Cappuccino is a change of Italian coffee, that is, in strong coffee, pour in steamed milk, coffee and milk at 1:1, the color of the coffee is like the cappuccino church monk's turban over a dark brown coat, hence the name caffeine. The traditional cappuccino is 1/3 espresso, 1/3 steamed milk and 1/3 foamed milk.

The ratio of coffee to milk in the latte is 1:8:1, so it can be said to be a burden-free cup of coffee, can drink the warmth of milk, like a cup of milk coffee, but drink milk with coffee flavor.

Mocha is diluted with a lot of milk, is a deformation of coffee, can be said to be the most fancy kind of espresso, which can add cinnamon, cocoa powder, is no longer a simple coffee, less foam than a latte, replaced by milk, whipped cream and chocolate.