linguistic performance vs linguistics

linguistic performance and linguistics both are nouns.

Word	Noun	Adjective	Verb	Adverb
linguistic performance	Yes	No	No	No
linguistics	Yes	No	No	No

linguistic performance (noun)	linguistics (noun)
(linguistics) a speaker's actual use of language in real situations; what the speaker actually says, including grammatical errors and other non-linguistic features such as hesitations and other disfluencies (contrasted with linguistic competence)	the scientific study of language
	the humanistic study of language and literature