The 10 year cask strength is great. It's a distinct step up from the normal 10.The 18 is good, but the extra aging changes the character a lot. The ten has an enjoyable brashness, it bludgeons you over the head with peat and meaty goodness. The 18 is more refined, putting it in similar territory to Lagavulin. But I think Lagavulin does that better.