Carter is the better individual player, but they essentially gave up Lee as well. And it's not always about the better talent, it's the better fit.
Case in point: The Pistons came awfully, awfully close to winning the le in 87 and 88. Two wrenching playoff exits when they could've easily come out on top. The chemistry was off in 89 for reasons that had nothing to do with talent: Rodman was a versatile defender who had earned more playing time, and Adrian Dantley resented it. They traded him to the Mavs for Aguirre. Now maybe at that point in their careers Dantley was a better player than Aguirre, but Aguirre was no slouch himself and was a childhood pal of Isiah's who would make no trouble. It was a people trade, not a basketball trade, and without it they probably don't win a championship that year.
I've just never been impressed with Vince Carter. Every NBA player will tell you he has, or had in his prime, just as much talent and skill as LeBron, Kobe and Wade, and he's never come close to anything they've done. Never gotten past the second round, and I'd have to check basketball reference, but I don't think he's even been on a 50-win team, whereas of those other guys, they all have at least a Finals appearance. He just doesn't have *it*, whatever that is.