DeNiro or Pacino?

The pairing of Robert De Niro and Al Pacino in the movie "Righteous Kill" is leading people to debate again which one of these fine actors is the better actor. I have to give it to Al Pacino by a hair, only because the three "Godfather" movies are my favorite films ever, and his portrayal of Michael Corleone is so brilliant. This YouTube clip proves how truly great these two stars have been over the years.