I was gonna chime in and say that I'm still not sure Crawford wins. Great boxers like Whitaker and Floyd, yeah, I'm sure they beat Tszyu. But TC has yet to prove he's quite that level. Tszyu would definitely find him with his power shots. However, provided TC's chin is up to the task of handling Tszyu's power, you have to favor him based on his versatility. Crawford's like a 55/45 favorite.
I think Crawford is the better fighter, but the outcome would heavily weigh on him being able to take what Tszyu can dish out. I think Crawford stops him late after touching the canvas.