http://spurstalk.com/forums/showthread.php?t=198209
People should read that thread and the associated article, one of the rare good threads started by H1N1.
The original premise of saying Duncan is the next Russell is the general concept of how one leader and superstar can put the team's goals above his own, and both Duncan and Russell were great in that. It isn't to say that Russell and Duncan have the same skills, or even the same impact, it's saying they have the same mindset.
Russell, due to the lack of stats, have been massively underrated in the new generation. He was willing to morph his game for the greater good of the team, and was very cerebral in his approach. These are some of the things that were exhibited by Duncan as well. Duncan, for all his individual dominance, was willing to adapt his game and sacrificed personal glory and still excel in most facets throughout his 14-year career. This is something that we haven't really seen since Kareem in the late eighties, but by the late eighties, Kareem was already way over the hill. Duncan did that in 2006, still close to his peak.
Russell was the greatest winner of all time because of multiple factors, but to attribute his 11 les in 13 years entirely to the fact that he played in a smaller league with smaller players and having a bunch of HoF teammates is way over-simplifying it. There was never any doubt that the Celtics revolved around Russell, from his defensive dominance to his beautiful outlet passes, but Russell just kept changing with the game, kept changing with his teammates, and did what Auerbach asked him to do, and what the team needed him to do, while still being the undisputed head to the Celtics snake.