Anyone trying to compare if Siggy is better than Hazard needs a serious examination of their football IQ.
Chances created is clearly important, but there are dozens of other stats needed, just on the chances/passing alone.
What about first touch, dribbling ability and speed, how good you are with the ball at your feet, speed of thought, weight of pass, fouls won, difficulty of pass, ability to get in/make space, forward runs, off-ball movement etc etc etc.
It all comes together on a pitch and either makes you effective at what you do, or not so effective. Stats don't always show the whole picture. Siggy seems to have all the ability in the world with his feet, but doesn't seem to have the mental awareness/speed of thought required to make him a world class operator.