S'tan and I tried two Aberlour 10s from a case of half bottles he bought back in the late 1990s. Here are the notes on the two
Nose: Spicey, prunes, lemon
Palate: raisin, oatmeal, liquorice, prunes
Nose: sour, malty, lemon, apples
Palate: lightly smokey, oakey, leather, apples
There was also a visible difference in color.