My brother is visiting us from S Africa and is a huge Ardbeg fan. We pulled these from the vault for a wee tasting:
The Blasda is the wimp in the group. Only 40% abv and very lightly,pleated, it really lack Ardgeb character. The Corrywrecken and Uidegaal are phenomenal and any Islay fan needs to have both. The new release Perpetuum underwhelms and although 57%abv doesn't reflect much peaty sweetness.
I like my Ardbeg heavy, cask strength and full,bore peat (they usually are around 24ppm).
Even Kato prefers the Uidegaal.