i use the default fov in both games.
Yeah the very first splits of all the versions were a mistake but now they try to migrate all versions to cf west (na, eu, spain are basically one version now = cf west)
The value i get from CS:GO to Crossfire doesn't feel even close to the same sensitivity.
In CS:GO i use a sensitivity of 2 and the calculator give me 15 for Crossfire ingame.
I already enabled the raw input mode in Crossfire but its way to fast on 15. I would say its more about 7 to 8.