Having driven Humvees with both on them, I would say they are both pretty good offroad, but the 36" bias ply tires (older humvee tires) will beat the livin piss out of you going down the road...
I agree, both of my trucks (the Dakota and the PW50) run Bias tires, and they do ride rough on the street. They also "Flat Spot" when it's cold out, and growl (because of the aggressive tread pattern).
Awesome traction though, the Dakota is running XTC Winter Treads, which are a form of the old Power King tires, and the PW50 runs a set of 40x17-15 Monster Mudders. No matter what i throw at the PW50 it just keeps moving. But when you've got almost 2 foot of tire grabbing the ground at each corner, there isn't much that could stop it
Used the beast to move a massive stump grinder the other day (the kind that is usually towed behind a tri-axle bucket truck
) The tongue weight alone was enough to compress the rear suspension 10"
No spinning, it just tugged it along with no problem. Not on the street obviously, off-road. I'm not insane enough to pull something like that on the street with a lifted half-ton mini pickup
Then after i moved the stump grinder, I rolled the PW50 into the garage, yanked out the little 4-Cylinder and started to drop in a 273 Chrysler Small Block for even more power
The Dakota on the other hand, the tires are 30x10-15's and they will spin if you don't have some weight in the bed. Towed a 70's 1-Ton Chevy Truck with it this morning, miles of winding roads with a Extended Cab Dakota with a Receiver Hitch & Tow-Dolly. It would chirp the tires pulling out from a stop. It did great, didn't sway, didn't push me around. I wouldn't want to tow much more than another truck with it, but for stuff like that it makes a great tow vehicle.
I'm gonna save the Front Dana 60 from that Cheby before I junk it, and it has one of those highly sought after Tube Grilles that you guys like to modify to fit the Ramchargers