User blog comment:SethHeartphilia/Whos stronger Erza or Mirajane/@comment-220.255.1.116-20150303151549

Erza. She has lots of will power whereas Mirajane gave up on training when Lisanna died. Mirajane damage output is also less than Lucy's, and for the person who kept saying Mirajane could destroy magnolia in seconds, so could Erza except that she can erase the universe in seconds.