User blog comment:FairyRaven/Fairy Tail Chapter 371: Tartarus Arc, Part 2: Song Of The Heavenly Dragon, Review and Commentary/@comment-24467372-20140214095355/@comment-1359322-20140214104222

Well maybe we can decide after seeing Minerva fight. If she can use Curses like the Nine Demon Gates, then maybe there's a minor difference between Mira's Satan Soul and their modifications.