User blog comment:SethHeartphilia/Whos stronger Erza or Mirajane/@comment-24446496-20140424024349/@comment-71.50.119.252-20140917053022

Also keep in mind that Mira said that when there's people around (as in her comrades and innocents) she be holding back her power so that they won't get hurt. But when she's alone with a foe, that's when she's not holding back. So that tell you that we never seen the true power of each of her Take-Overs but we've seen Erza's alone or not.