And I will do two head-to-heads: the 30-years old 5th vs. the 25-years old 7th release and the two 20-years old Rare Malts from 1975 and 1982 against each other.
So the clear winner is the 1975 mainly for its bigger complexity (yes, peat induces a lot of additional flavours and aromas over such a long time) and punchy freshness. Nevertheless
the 1982 is very nice too, but in a blind tasting you would not guess these two drams are from the same distillery and at the same age. Really interesting to see the difference peat makes...
The colour of both drams is pretty much the same. Both noses are quite closed due to to the high abv. But you smell it already unreduced and, of course very much better with some water added, this is peat vs. neat part two. The 75 offers a full load of peatiness while the 82 is rather gentle on that side.
The 75 offers an incredible rounded and balanced profile of both peaty and sweet flavours together with lots of different spices. In contrast to this the 82 is more dominated by the vanilla aromas (and much lesser by the peat). Both are excellent swimmmer and improve significantly with some water added.
Again both have this bold, fat, punchy Brora-ish mouthfeel, really delicious. They stick literally to your tongue. Very long finish on both sides, but with clear advantages to the 75 for its complexity and more balanced flavours profile.