Having tried the 12 year old as well, the 18 year old adds another layer of happiness. It seems to plug all the gaps that are perceivable in the 12 year old, with the 7.5% extra ABV definitely giving it a punch that the younger cousin lacks. It would be interesting to assess both expressions with 43% ABV in either, as the difference in the additional 6 years of aging might be better discerned then.
full, fruit, toffee
rich honey, syrup, oak, citrus