I think that the whole canon thing is not worth that much anymore. Lucas originally had a story that covered everything from episode 1 to 6 and really didn't intend to make much else beyond that. If he agrees to let KOTOR and the expanded universe become canon, then it means Revan is more powerful than Anakin.
Problem is that if Lucas said something that conflicts with the expanded universe or KOTOR, you don't simply yield to Lucas because he was the creator. I would go with what you observe from the movies/games or what you read in the books. If Anakin never manipulated a star destroyer, then we should assume Starkiller was more powerful in that regard. If Revan had done much greater feats than Anakin, I would rely more on what he could do than what Lucas said.