[M3NOLA]

I'm about to buy winter tires but I'm not sure whether I need Performance Winter tires (i.e. Dunlop Winter Sport 3D) or Studless Ice and Snow tires (i.e. Blizzak WS70). I plan on driving in the city in Calgary mostly on weekends but will also be going up to the mountains to Lake Louise and Sunshine every week or two for skiing. I'm sure the Performance is fine for the city but my concern is that they will not be sufficient for the snow days in the mountains. Since I'm from New Orleans, I've never driven on snow before and would appreciate any guidance.