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

Hi All, I am at a point where I just can't decide on my new tow vehicle. I have a 33ft 2016 Radiance TT with a 6700lb dry weight. I currently tow it with a 2013 Tahoe 4X4: Vortec 5.3L V8, 320hp, 33...