Ford generally has a stiffer suspension than Chevrolet. I know, someone's gonna climb my tree now, but that's the facts. I've owned 3 Fords with 300 inline 6's F150. They all did pretty good towing. They weren't all that fast, but they could handle the boat. I had a GMC wih a 350 in it, and it was a speed deamon on the highway, but the brakes were weak, and its weak suspension didn't handle curvy roads well.
In our club, there are 2 Fords and a host of Suburbans. Back in my 300 6 cylinder days, theyd sure out run me on the highway, but when we went to Dale Hollow throught the crooked roads, that Ford would leave them behind simply because it would handle better.
Than said, I've not owned a new style Ford half ton, nor have I driven one much. In 1997 Ford switched from the I-beam suspension to an A arm type similar to Chevrolet. I don't know how stiff they are. Also, the newer V6 while it has a little more horsepower than the old inline 6 doesn't have near the torque. Not that that 300 was a speed deamon, but it would pull pretty good.
I'd hook the boat I was thinking about buying and pull it and see what I thought. Any boat 18 and up in the glass variety will probably have trailer brakes. They are required in some states in that class. It is important to service your trailer brakes at a minimum once a year. By service, I mean blead the lines. Mine has a detatchable tongue, and it does get air in the line from time to time. I have it service about twice a year by my regular auto mechanic.
Skipper