Sorry, you want to pick out just 2 (or 4?) seasons of his career to date and compare that with other players records that include their development and their decline? Lets pick out half a season Michael Ricketts had with Bolton and say he's right up there too then
He's an excellent player with an excellent goalscoring record but there have been many others that have equalled or bettered his record. That doesn't mean they're better than Cristiano Ronaldo, just like he (imo) can't be compared with Messi or Maradona because of his strike rate.
And give this Utd hate thing a rest too. I couldn't stand him but I've always said Schmeichel's the best keeper I've ever seen.