Thanks to Aidan, I had the opportunity to try these 2 great whiskies against one another:
N: Big industrial style potstill. Linseed oil and a hint of diesel. Dried fruit (currants), big spice and some sherry.
P: Oily good transference to palate from nose. Dried fruit comes through strongly.
C / B: Warming fruity finish. Very different to today's Power's Not as well behaved, but much more flavour and for me a superior whiskey.
N: Estery potstill - white fruits and peaches. honeyed and sweet.
P: Sweet, but not too sweet. Soft pleasant mouthfeel, with honeyed fruitiness and soft grain.
C / B: Quite spicey warming finish. Medium length.
Both with big pot still influence but very different character. I would never have guessed they were the same brand. I prefer the old version.