As adjectives the difference between raggy and jaggy
is that raggy is raglike; like a rag while jaggy is jagged, toothed or serrated.
raggy
English
Adjective
(er)
raglike; like a rag.
scruffy; tending to dress in rags.
Similar in style to ragtime music.
jaggy
English
Adjective
(er)
jagged, toothed or serrated