I don't feel like Levin and Fox should be compared on the same level. Don't get me wrong, Fox is selfish and tried to kill Tobi the instant she seemed like a threat, but Levin is even worse, by trying to kill them the first chance he got in order to secure his own advantage.
Also did anyone else catch the joke with Tobi's name? She's Tobi B. King. To Be King, and she's the heir to the current king.