I'm actually a fan of both on Facebook, and I follow both religiously, and ZeldaInformer, but I prefer ZeldaDungeon. It updates much faster and seems more dedicated to the fandom.
I get all my news from here, and it's almost as bad as Tumblr. I swear to myself I'm just gonna check it for TWO SECONDS, and all of a sudden, I'm on the forums or reading walkthroughs of games I've beaten and it's three hours later XD