User blog comment:CNBA3/Fairy Tail Zero 6 review/@comment-25111584-20141217170017/@comment-7418318-20141220133633

It's not anything significant, just tiny little bits that made it feel a little less overpowering to me. But as I said we get to know the reason for Lucy's behaviour better and why she's acting so brutally.

I think I can give that away without really spoiling anything, but you'll learn Lucy's real name (first name anyway) at the end of the manga.

Oh and the manga also has the "Elfenlied" (the song) in it. It was always a bit weird to me that they couldn't or didn't want to find a way to fiddle the title-giving song into the anime at some point, not even in the ending-score or something.