Science fantasy would be a mixture of the two, it may take mythical or fantastical elements and find a way to apply scientific concepts to it. Futuristic fantasy would be fantasy that takes place with futuristic technology, but has significant core elements that are not "possible within established or postulated laws of nature."
I think hyperspace and similar are fall under "postulated laws of nature" but feel that Star Wars's The Force does not. Additionally, Star Wars build much mythos into its series.