The clearest explanation of the differences between fantasy and surrealism I've yet to see comes from Ursula K. Le Guin's essay "The Critics, the Monsters, and the Fantasists."
3 Steps to Tell Surrealism from Fantasy Fiction

The clearest explanation of the differences between fantasy and surrealism I've yet to see comes from Ursula K. Le Guin's essay "The Critics, the Monsters, and the Fantasists."