well-mannered vs mannerly

well-mannered and mannerly both are adjectives.

Word	Noun	Adjective	Verb	Adverb
well-mannered	No	Yes	No	No
mannerly	No	Yes	No	No

As adjectives, well-mannered and mannerly are synonyms defined as:

well-mannered (adjective)	mannerly (adjective)
socially correct in behavior	socially correct in behavior
of good upbringing