To categorize the elements of each type of poem, you would organize them as follows:
Villanelle:
- mostly three-line stanzas
- rhyme scheme of ABCB
Ballad:
- second line of each stanza rhymes
- all four-line stanzas
(Note: There seems to be an error regarding the rhyme scheme for Ballad; typically, Ballads have a rhyme scheme of ABCB or ABAB, so clarify with the source material if needed.)