cognitive content vs cognition

cognitive content and cognition both are nouns.

Word	Noun	Adjective	Verb	Adverb
cognitive content	Yes	No	No	No
cognition	Yes	No	No	No

As nouns, cognition is a hypernym of cognitive content; that is, cognition is a word with a broader meaning than cognitive content:

cognitive content: the sum or range of what has been perceived, discovered, or learned
cognition: the psychological result of perception and learning and reasoning

Other hypernyms of cognitive content include knowledge, noesis.

cognitive content (noun)	cognition (noun)
the sum or range of what has been perceived, discovered, or learned	the psychological result of perception and learning and reasoning