I've never seen a bottle of the 12 in the wild, but I'm planning to start scouring once the Diageo releases the 2019 bottles, as recently announced.   In the meantime, I had the opportunity to try the 2018 at the wonderful Flatiron Room in Manhattan.  I love both the 16 and 8, and I was curious to see which one the 12 was more like.  After tasting it, I say that it about equally similar to both.  Like the 8, it is a bit rowdy, with a strong but controlled amount of ethanol (due to the youth of the 8 and the higher proof of the 12)  It also shares some of the lighter notes of the 8.  But it also has a richness and fullness similar to the 16. A very nice dram overall, and one that I think will be enjoyable for fans of either the 8 or 16.