By Evelyn Waugh satirist is a man profoundly revolted by the society in which he lives. His rage takes the form of wit, ridicule, mockery.
Caricature consists merely in exaggeration.
To burlesque a statue of Hermes, you need but put a top hat on his head. To caricature it you must exaggerate its every limb and feature. A satirist may do anything he likes to that Hermes except carve it originally from the stone. Someone must do that for him. In the nicest sense, he is critic.