Difference in strength between Fide Masterss

I played two FMs in a recent tournament, I scored 50% against them which isn't bad considering I'm only a national master, but the shocking change is the difference in strength between the two. I get completely crushed by one and I'm on the other side of the equation in the second time. I had black in Both games: The ratings associated with the players are CFC not FIDE, both of my opponents have fides around 2300.

Overall I had a good tournament but since I screwed up in the 4th round in a won position against a strong expert I didn't mange to finish in the top 3.