There is also a big difference as to what you mean by "fitting". If you are asking if you can "fit" a wakesurf board in a wakeboard rack usually the answer I have found is no unless it's a skim board.
Also if you force a wakesurf board into a wakeboard rack you will likely damage the rubber deck or scratch the board. Additionally the forks on a Wakeboard rack are significantly shorter than those of a wakesurf rack which provide much less support especially if you hit a big wave and jolt the boat.
Just my opinion.