I recently purchased a 40' fifth wheel toy hauler, triple slide. The dry weight is 14,050 lbs., I figure 1000 lbs. of gear, my motorcycle is about 950 lbs., hers is 650 lbs. We try to two with minimal...
I don't think there is a plugged nickels worth of difference in the towing of the big 3. Figure out how much truck you need. Towing and payload primarily. That's your baseline you can't go below, if it's a dually so be it. Then start shopping for the one you like the best or get the best deal on. All have the same warranty.