Looking at buying a new truck for a camper, first time

I am looking at buying a new truck and would like to have something that can tow my boat that weighs roughly 5500lbs all loaded up and have a cab over camper at the same time. I was out looking at leftover 2017 Ford F250 and F350. I don't have a cab over camper in mind but ideally I like the single slide models when I have been looking. I am debating between the F250 or the F350. The F350 can handle around 3950lbs payload from what I can see. The F250 is 3450lbs. I think the F250 would be better for my daily driver. My understanding is the only difference is spring rates between the 2 trucks, but I think I'll need Timbrens anyway. I have never driven a truck with a camper and was hoping someone could help me in the right direction. I am concerned the F350 will be too harsh as a daily driver over the F250. Any opinions on the new super duty?