yeah anikin is more powerful even Palpatine says so. The Emperor said: "Darth Vader will become more powerful than either of us." That means he isn't as powerful as the Emperor yet. The OS says the Emperor is the most powerful dark side practicioner. Lucas referred to the Emperor as the "toughest" in regards to his duel with Yoda. McDiarmid said that his character is "much more powerful" than Anakin. According to Master Replicas, the Emperor and Yoda are the "greatest wizards of the Force in the galaxy".Yoda sent Obi-Wan to fight Anakin, meaning he considers the Emperor the stronger of the two. Obi-Wan can fight Anakin because of his experience, but can't even compete with the Emperor.