For what it's worth, I drove my Model S (Tesla Pirelli winter package) and Bhuwan's (Hakka R2's) on the same route, back to back, and the Hakka's were clearly better. There was also a fair amount of difference between the (Tesla) all season's that another Model S on that same route that day had compared to even the Pirelli's. Should help put to rest any doubts between the tires ...