We are in a similar boat and have been researching class C's for several months.
The older Fords seem to garner a lot of complaints about steering wander, this complaint disappears after about 2008 or so when they redesigned the front end.
Both are proven performers and I am sure either one would serve you well but the thing I keep coming back to is why do 80-90% of class C coach buyers prefer the Ford chassis? You know the RV industry is going to use what sells best, it's in their best interest.
There has to be a reason and I can't imagine it's just the additional few hundred pounds of payload you get with the Ford.