There's a reason everyone loves batman.
Both are great though. I really like the whole Norse mythology thing with Thor, and Thor is actually my second favorite character after batman. Love his warrior, almost arrogant spirit and how he's the greatest god of them all, and I especially like Stracyznskis focus on his character more than the action in his series, as well as Jason Aarons usage of young and old king thor. Batman's just a better character though.