As adjectives the difference between saggier and jaggier
is that saggier is (saggy) while jaggier is (jaggy).
saggier
English
Adjective
(head)
(saggy)
saggy
English
Adjective
(er)
Baggy or loose-fitting.
That sinks or droops from wear or its own weight.
jaggier
English
Adjective
(head)
(jaggy)
jaggy
English
Adjective
(er)
jagged, toothed or serrated