What's the difference between lexiphanic and magniloquent?

Lexiphanic

Definition:

(a.) Using, or interlarded with, pretentious words; bombastic; as, a lexiphanic writer or speaker; lexiphanic writing.

Example Sentences:

Definition:

(a.) Speaking pompously; using swelling discourse; bombastic; tumid in style; grandiloquent.

Example Sentences:

(1) So one theory has it that, as the former political speechwriter Barton Swaim has written, Trump is popular precisely because “he never uses magniloquent rhetoric for any reason.
(2) We’re going to win so much and we’re going to make America great again.” This actually is magniloquent rhetoric, but it is also dazzlingly vague.