call the shots vs call the tune

call the shots and call the tune both are verbs.

Word	Noun	Adjective	Verb	Adverb
call the shots	No	No	Yes	No
call the tune	No	No	Yes	No

As verbs, call the shots and call the tune are synonyms defined as:

Other synonyms of call the shots include wear the trousers.

call the shots (verb)	call the tune (verb)
exercise authority or be in charge	exercise authority or be in charge