Oh boy lol, I probably should not jump into this right now, but I am sitting on the couch next to the wife, and she is watching the Lifetime television network, so I guess this is the lesser of the two evils, here goes. Having owned a F350 SD DRW 4x4, and a Dmax, both for almost 100k, I liked the ford cab better, although it had a little less legroom, it was way bigger when it came to width and headroom, it also had more room behind the seat for storage. The chevy cab, although much smaller, seems to be far more air tight at 97 k than the ford was, this advantage is offset by the fact that my chevy currently has no backlighting on the speedometer, gear indicator, oil pressure gauge, voltage gauge, or the left and right temp selectors on the heater control. Ford may build lots of stuff in mexico, but I swear that half of GM's electrical design team are interns straight out of amish country.
As far as trailering is concerned, I will not compare power, since one was gas, and the other is diesel. Suspension wise the ford was about about equal to the chevy, despite the ford being a 350 dually, it only had 5 leafs on the rear springs with no helpers, and sat WAY high in the back as most 99 model year 350's did. The Ford brakes lasted for 60k, but I literaly had to stand on them when towing to slow down, the Chevy has a way better pedal feel, but the brakes last half as long.
Both trucks were good vehicles, but they both had their own quirks, the Ford had 5 IAC motors go bad, 2 4WD selector switches, and 4 hub vacume seals. The Chevy has had 6 steering intermediate shafts, on its 3rd set of rear universals joints, 2nd drivers window regulator, the mentioned dash issues and countless tailight and daytime running light bulbs.
I got rid of the Ford at 98k miles because in needed more than I wanted to put into it, Frontend, tires, hard lines,etc. The Dmax has 97k on it it currently, and pretty much needs everything the Ford did, only reason I am fixing the Chevy rather than trading it is that I am going to try and wait a few years for the big 3 to figure out the emissions on diesels.
Both my Ford and Chevy were purchases that today I am still glad I made, but each truck had its own respective problems that IMO were due to the manif. cutting corners.