Dirk Nowitzki is a jacked up Raef LaFrenz. That's about it. A tall white guy with an outside shot.
If Dirk was Bird, Dallas would have won in '06 or perhaps, one of the teams with Nash might have gone to the WCF. But one thing's for sure, they wouldn't have been swept by the Warriors in the 1st round.
Bird was a consummate post up player with a great outside shot along along with all the rebounding and passing skills, unlike anyone else.
With Bird on the Mavs, Mark Cuban would simply need to recruit a defensive backup PF and a defensive backup wingman, and the Mavs could possibly take it all. This would be a poor man's Cedric Maxwell and a poor man's Mark Bowen. Yes, they wouldn't need added bench players of even that caliber.