As adjectives the difference between raggiest and saggiest
is that raggiest is superlative of raggy while saggiest is superlative of saggy.
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.
saggiest
English
Adjective
(head)
(saggy)
saggy
English
Adjective
(er)
Baggy or loose-fitting.
That sinks or droops from wear or its own weight.