computer guru vs computer expert

computer guru and computer expert both are nouns.

Word	Noun	Adjective	Verb	Adverb
computer guru	Yes	No	No	No
computer expert	Yes	No	No	No

As nouns, computer guru and computer expert are synonyms defined as:

computer guru and computer expert: an authority on computers and computing

computer guru (noun)	computer expert (noun)
an authority on computers and computing	an authority on computers and computing