User blog comment:Omega natsu2/Chapter 367: Jellal vs. Oración Seis, Predictions./@comment-190.172.188.65-20140113050538/@comment-7418318-20140113075651

Considering how Silver's scar does not cover all the places where Gray's scar is, I seriously doubt they are (or were) the same person. And if he's "hellbent on killing demons" why would he work with the other Demon Gates? There's got to be more to it than just that.