There's something more about Harry and Voldy's relationship that we don't know yet. We know that Harry can't touch Voldemort but Voldemort can touch Harry without hurting but he cannot handle emotions (remember that he had to leave Harry's bod. because he couldn't stand the loving thoughts Harry had). So Voldemort might have one up on Harry but it's a limited strength. We also know that Harry isn't too good at the Avada curse. He couldn't kill Bagotrix!