redundant vs superfluous

redundant and superfluous both are adjectives.

Word	Noun	Adjective	Verb	Adverb
redundant	No	Yes	No	No
superfluous	No	Yes	No	No

As adjectives, redundant and superfluous are synonyms defined as:

Other synonyms of redundant include excess, extra, spare, supererogatory, supernumerary, surplus.

redundant (adjective)	superfluous (adjective)
more than is needed, desired, or required	more than is needed, desired, or required
repetition of same and identical sense with different and non-identical words	serving no useful purpose; having no excuse for being