I think I am comfortable enough now to put some big tires and start exploring a bit. I have been researching this for a while and came dow to 2 options

I have the groove wheel and breaks with the groove landing gear. I operate out of a paved airport and need some that will last not wear so fast like the ABW. So I ruled out ABW.

Option 1
26" - Goodyear 260K61-1 Smooth Tundra 26x10.5-6-6-Ply 120 mph Tubeless Aircraft Tire.

Option 2
21" - AERO CLASSIC SMOOTH TUNDRA FAA TSO TIRE 850-6 4 PLY

I believe they both work with my 6" groove wheel.

Are they comparable?
Tube or tubeless?
Does the 26" makes that much difference for backcountry operations?

Weight for me is not an issue as I am light and most of the time I am by myself.

Thanks
Alex Di Sessa