VS Attack

To be clear better your ovr, better are your chances(yellow ones i.e. Great chances) against a lower ovr opponent, not otherwise :)

If you are questioning that he had 13 and you had only 12 chances, it depends on the time you play your each turn.  Sometimes if its a tough chance which takes time, I just kick the ball out or run into a opponent defender to save time.  Anyways its not much of a difference but I have seen people easily doing 15-16 chances in the same time (one guy did 20 which was way above normal during a team tournament).