Question answered. After decades of Audi's Quattro, I have been concerned about my Stelvio Quadrifoglio's performance in the snow. Well, yesterday I was caught in over 100 miles of heavy snow and sleet. My Alfa, with four Pirelli Scorpion Winter tires, behaved flawlessly. While the torque redistribution is not as seamless as Audi's, everything else about the traction, stability, and transitional behavior is actually better in the Q4 Alfa system! The Stelvio QV's flexibility is absolutely amazing. It goes from Ferrari-esque performance on dry pavement in either "D" or "Ripped!" mode, to a Sno-Cat in "A" mode in a blizzard.