You answered your own question mostly.
A new 6.2 10speed will be considerably stronger on the go pedal and the new chassis and trans are a nice upgrade as well.
Not going to see alotof difference towing wise in the wheel base, imo.
Movingto a 3/4ton truck will provide a much stiffer, better suited for towing, ride, at the expense of power unless you opt for the diesel. 6.0 is pretty much identical to the current 5.3s for power. 4.10s will help a little, but the 6.2 will still put the 6.0 HD or 5.3 in second place from a power standpoint.
If you say you can notice the payload differences between 2/4wd or base vs Denali trim, you’re “looking” very hard to find that difference real world.
Pick your favorite color, all your options will work great.
