sweet-flavored vs sweetened

sweet-flavored and sweetened both are adjectives.

Word	Noun	Adjective	Verb	Adverb
sweet-flavored	No	Yes	No	No
sweetened	No	Yes	No	No

As adjectives, sweet-flavored and sweetened are synonyms defined as:

Other synonyms of sweet-flavored include sugared, sweet.

sweet-flavored (adjective)	sweetened (adjective)
with sweetening added	with sweetening added