A cappuccino has less milk and much more foam than a latte. They start with the same espresso, but a cappuccino wears a deep, airy cap of foam, often 1.5–2 cm, while a latte is mostly liquid milk with a thin layer on top.
The differences
Foam: a cappuccino has about three times as much, roughly a third of the cup.
Milk: a latte has more liquid milk, so it tastes milder and creamier.
Size: a cappuccino is usually served in a smaller cup, 150–200 ml.
Finish: cappuccinos are often dusted with chocolate; lattes are often finished with latte art.