I agree with you, but I'd honestly favor PRX vs Optic for sure, and I think FPX will get taken out before they meet them. Fnatic, I have no clue how they'll do but yeah they could def win it.
I don't think they do actually because they put more emphasis on retakes and great midrounding. They're a bit less execute heavy. Both teams have great utility combos and teamwork tho, so that's similar between them.