I’ve run both.
Personally the Fox are nice if they have the upgraded internals (2014 internals).
Service intervals are shorter on the Fox(bad) the servicing on the revs is stupidly easy to do.
Early 2013 fox versions tend to dive under braking and the cdt levels were odd. The C setting was soft(solid on the 2014 versions) and not a lockout like the new damper is. The t mode was to low on the compression setting (as was the whole fork) again improved by the new internals.
Revs are a solid fork, not as plush or sensitive as the Fox and under extreme loads the wheel could deflect left to right. But it’s a solid fork, easy to setup and maintain while it may lack a little sensitivity over the Fox it doesn’t dive in the middle of the stroke like the Fox did pre 2014 internals.
Fox Vs the revs people will mutter utter rubbish about Fox “massively” flexing compared to the revs. Having run both back to back the Fox has a little fore and aft flex and I personally found the revs to have side to side flex but it’s not massively noticeable in either.
From me the choice is between a fork that’s sensitive but costly to maintain or reliable and easy to maintain.