Pau Gasol or Dirk Nowitzki?

Who is better? Gasol is a great low-post player, good rebounder, shot-blocker, decent per, and an above-average defender. Nowitzki is a better scorer and shooter, about the same in rebounding, better ball-handler but not as good defensively as Gasol, one-on-one or shot-blocking. I would give a slight edge to Dirk.