FPX has a good chance of beating Sentinels imo
I'd honestly say 60/40 SEN.
SEN's main issue was getting absolutely fucking dominated on map control and getting read like a book. In team fights, they were trading pretty consistently and getting the kills.
FPXs calling doesn't seem to be the best, yet their aim looks disgusting.
If SEN can stop trolling with some of these comps, and play their regular game. They have a slight advantage.