You cannot compare Jrue and Harden. Harden is elite at getting to the rim, finishing, shooting, and passing. He is an elite offensive player. He's terrible on defense, but in my opinion, its both a conditioning thing and a mental block. He just doesn't focus on defense. I think Jrue is above average in every category, which is great for us, but Harden right now is the best shooting guard in the NBA.
When Dwight wants to play at his best he can turn it on. He only has about two or three years left in his prime and I think he will start to decline. AD will be a more dominate player on offense and he will be just as good on the defensive end. The Pelicans as a whole team might be able to beat the Rockets, but if they were going two vs two, next year Dwight and Harden are better.