They are one year apart, despite Al Jeff being in the league longer. Neither is a good defender, and both are skilled offensively. Slight edge to Al Jeff as he has an assist-to-turnover ration above 1, and he blocks over one shot a game. A big concern to Jazz fans has to be his disinterest in being fouled (plays inside, shoots under 3 free throws a game).
Al Jeff makes $14M a year - will the Wolves pony up even $10M a year for Pek? Especially when they previosuly HAD Al Jefferson and couldn't win with the real Al Jefferson, why would you pay $10M a year to get the white version?