The An Oa's peat has a more vegetal character to it, not the upfront medicinal style that I like so much about the 10yr. It's softer too, with less of a sting on the cheeks. Salt, sweetness (honey and lemon), a little nutty (peanuts?), and a slight bitter finish. I like the 10 more, and for a lower cost. 3 1/2. Newly opened bottle...maybe it'll open up given time.