How can you not take CP3? He's pretty unstoppable on offense (he can create for himself or anyone on his team at will), has excellent decision making on both sides of the ball (that's why his team wants him to always control the ball), and has a great sense for the flow of the game.
He may be smaller and weaker, but he is also significantly quicker. Any comments that he's a me first player and has to dominate the ball to be effective are ridiculous. He doesn't have AI's mentality. He looked pretty unselfish last Summer and I'm sure he could adapt to any system.
DWill was plugged into a system he was handpicked for. He's a great player for sure, but he lacks the special quality CP3 has right now, and has accomplished less with more talent around him (Utah might be the deepest team in the league and certainly had a better system in place when both arrived).
The better player is Chris Paul. The better player for Utah might have been DWill, but he's just not playing at CP3s level right now as an individual player. Unless Utah wins some titles this shouldn't even be a discussion.