Duff is right, and there was no bigger Chicago Bulls fan than this guy growing up in Chicagoland.
LeBron is unlike anything we've ever seen as an athlete. What he doesn't have is the killer instinct.
Remember that he is only 28.
But he has logged roughly 30,000 minutes in the NBA. 40,000 minutes in the NBA is like being a 30 year RB in the NFL, basically you're on borrowed time. James is about 3/4 through the prime of his career even though he is still a young guy.
Some guys such as Paul Pierce, Dirk, Kobe have gone past 40,000 and still be effective. James probably can too but don't expect this production to last into his mid to late 30s like Jordan.
Remember Jordan played 3 seasons in college, which is not even close to the NBA grind. He also had one year basically off early in his career because of injury and than 2 years off after his first 3 titles.