Matcha latte is made with matcha powder, which is a type of green tea powder, and milk. The matcha powder is whisked with hot water to create a frothy mixture, and then milk is added to create the latte. Milk tea, on the other hand, is made with tea leaves (sometimes powder), milk, and sugar. The flavor and texture of the two drinks are quite different, with matcha latte having a distinct earthy and slightly bitter taste, while milk tea is sweeter and creamier.