Premium brands go one or two steps further make the the taste better in terms of smoothness, aromas, and supposed to be more smother and tastier and goes through different distillation single pot, double or triple distillation, filtration and maturation process using single or double casks.
Premium whiskey blend made of single malts from Kininvie, Balvenie and Glenfiddich. Generally preferred for use in cocktails and with mixers. Very smooth, very sweet and drinkable. Only 27 casks are used to make each batch though, which makes it a little bit boutique in its own right.