fairy-tail-vs-rave-master - well, they were both made by Hiro Mashima, so it's no surprise. But I gotta say, they are both awesome anime! I enjoyed Rave Master (both the anime and manga) very much, and I'm still waiting for new episodes of Fairy Tail (yes, Hiro still plans on making more eps.) but until then, I'm reading the manga. :D
I was talking about Fairy Tail the other day and a friend of mine, who's only been watching the anime, asked me to spoil it. Oh my goodness, her reaction! Ah, I still left out certain things that didn't directly connect to where she's at.