2018 Yukon Denali 4X4 vs 2018 Yukon Denali XL 4X4

Longer wheelbase usually equates to a more stable tow, how much is subjective. A crew cab 2500 with a canopy is just about the same as an XL unless you need 3rd row seating or if you like to converse with your cargo (as in dogs or other pets). They can be made to be pretty comfortable.