For people who haven't studied the series as closely as nick, here's how Pau Gasol and Zach Randolph have matched up:
20 games played (10 wins, 10 losses each)
Pau: 17.8 points, 9.0 rebounds, 3.0 assists, 2.8 turnovers, 48.2% FG% in 37.3 minutes
Randolph: 19.3 points, 9.8 rebounds, 1.7 assists, 2.2 turnovers, 48.1% FG% in 30.4 minutes
In other words, Randolph scores more points and grabs more rebounds, despite playing seven fewer minutes per game. This isn't an aberration over a couple games, either; it's been a pattern for several years.
Randolph has had some of the biggest games of his career against Pau, including a 43 points / 17 rebound game, and another game where he went for 42 / 12. Since Gasol has moved to LA, Randolph has averaged 20.0 points and 13.7 rebounds, to Gasol's 15.3 points and 10.3 boards.
In other words: Advantage Randolph. (I fully expect people not to buy into Randolph trumping Gasol, but head to head, that's exactly what has happened.)