whats wrong with wow?

[Betelgeuzah]

How is WoW harder?

It may be easy at first but once you hit endgame it is no longer. There is simply no competition in that department.

Not that it matters aside from the argument advantage when comparing the games. Most people don't care about challenge in their MMO's (or RPG's). Those who are looking for a challenge don't usually play these games, because there's so much crap to go through to get to the good stuff.