I think either of FNC or M3C would be favored at like a 60:40 or 65:35 to win against pretty much any team outside the other. I wouldn't say the same for FPX, though. that still leaves a massive margin for other teams to win.
C9, DRX, KRU, PRX - they all are top tier teams that put in the work. they all have incredible players that can singlehandedly win rounds - keznit, leaf, stax, f0rsaken.
At the end of the day, the better team on the day will win the match.