Kenny then its a new diferent story, apart from the overall quality of the team (%) there are other factors that can determine the outcome of the game, some you can't contol (luck) and then there's the tatical part witch i think is the most complex thing in the game.

From my experience sometimes teams up to 10% lower % can be a little pain, and teams up to 10% stronger you have the oposite effect.

So my advice to you is to be active and creative during the game, there is no such thing as an equal game so you should not play alllways the same way, try predicting you oponent strong point and countering them.

If you want extra advice you can share with us some prints of you team and oponents tem so people in the forum can further help you.