favorable vs preferential

favorable and preferential both are adjectives.

Word	Noun	Adjective	Verb	Adverb
favorable	No	Yes	No	No
preferential	No	Yes	No	No

favorable (adjective)	preferential (adjective)
(of winds or weather) tending to promote or facilitate	manifesting partiality
encouraging or approving or pleasing
giving an advantage
presaging or likely to bring good luck or a good outcome