broth of a man vs broth of a boy

broth of a man and broth of a boy both are nouns.

Word	Noun	Adjective	Verb	Adverb
broth of a man	Yes	No	No	No
broth of a boy	Yes	No	No	No

As nouns, broth of a man and broth of a boy are synonyms defined as:

broth of a man and broth of a boy: an outstanding person; as if produced by boiling down a savory broth

broth of a man (noun)	broth of a boy (noun)
an outstanding person; as if produced by boiling down a savory broth	an outstanding person; as if produced by boiling down a savory broth