At it's peak, the rivalry between the San Antonio Spurs and the Dallas Mavericks was one of, if not the most intense one in the NBA. The teams differ in ideologies, as the Spurs have focused on building through the draft and used free agency to find role players, while the Mavericks seem to always be swinging for the fences on the open market, and have had multiple makeovers through the years.
Both teams have stars at the same position, but who play that position in their own styles. The Spurs have Tim Duncan, the all-around legend, who has made his living with a bevy of post moves and rim protection on defense.