My F450 is marginally better handling with my camper the way I used to carry it on my modified SRW. However, I no longer make sure I only carry what I absolutely need. In that respect, it is significantly better. The mileage of my 6.0 with 3.73 is also quite a bit better (3-4 mpg) compared to the 6.4 with 4.30s. However, the 6.4 is still currently stock with not even a minimal engine update.
I bought a drw F450 because I didn't need a SRW any more. Also, my thought is that eventually I might add a fifth wheel as well.
