12 and 15 down now to the 18 yr. Poured neat, on the nose the sherried wood becomes more pungent, the family fruits ripen and the malt thickens. Everything has more depth and balance. Palate brings powerful flavor delivery of sherry malt, sweet wood, dark fruit notes and wispy coffee. Finishes with oaky fade and malt with trailing fruit notes. More complexity and heat than 15. Drinks like a 100+proof bourbon with the powerhouse flavor delivery but carries heat of 90pf. This is $100+ scotch and should be excellent and it is......93/100......... These higher priced/ longer aged single malts are where the tables turn on bourbon. If aged so long most bourbon would be over oaked and the balance would be all off. These damn scotches just get better and better, quite an expensive rabbit hole. The value equation will never be equal but its like comparing a Camaro or Mustang to a Porsche or Maserati. Its personal priority and preference combined with cost and desire. To each their own in the land of whiskey