Oh god, Ika manzai. This can't become any more awesome.
Do you know how much the difference has to be? I had (pretty sure, I guess I could have misread it) a game just now where my team was B-/B-/B-/B-, the opponent was B-/B-/B-/B, we won and got +10. I mean, obviously that's not a huge difference, but how big does the disparity get before it starts to matter.
I don't have hard numbers to support my post. I'll have to note few matches with difference in scoring.
EditA few matches I quickly did:
My team: A+, A+, A+, A
vs A+, A+, A+, A+ = Win +12p
My team: A+, A, A+, A
vs A, A+, A+, A+ = Win +10p (Knockout)
My team: A+, A, A+, A
vs A+, A, A+, A = Loss -10p (Knockout)
My team: A+, A+, A+, A
vs A, A, A, A+ = Win +8p (Knockout)