i didnt read the extent of offroading you intended to do, and if the truck was to be used for other "load" uses.
it kind of matters, because a pickup, is a beast of burden, first, and offroad a secondary function, unless its a raptor.
the difference is articulation. the 2nd most important attribute in off roading to a proper contact patch (tires) is articulation. articulation, and beast of burden, are like liberty and freedom, in that they are both great ideas, but are diametrically opposed to one another. Some companies go so far as to make off road beast of burden trucks, that have frames that are intended to flex. that expense is not designed into any typical pickup, so its one or the other.
so my question would be...
do you intend to use the truck to haul gravel etc. for work or home use? do you intend on using this as a car and driving mostly empty? or, will this be a permanent install?
if its a permanent install, i would be setting up a custom suspension to articulate the rear and ride nice at the right static height, specific to a particular weight range.
if youre going to be empty most of the time, i would shy away from the HD trucks and use airbags to supplement a stock 1/2 ton suspension if needed.
if youre going to use it to build a house while not carrying a camper, i'd go with a HD truck and get a heavier camper so it would ride decent. an f350 dually isnt going to know a 4wc is even in the back, and NVH will just suck, for instance.
no shoe is a one size fits all proposition, but you can buy a shoe that fits YOUR foot. its a matter of taking measure of your foot.
and, i'm completely unaware of any truck line ever that had the same frame in a 1/2 ton as a 1 ton. you go from SRW to DRW in a 1 ton, and you get a different axle nowadays.