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