I've tried the Compass Box Eleuthera (vatted malt, Clynelish/Glenlossie/Caol Ila) and Hedonism (vatted grain, Cambus/Cameronbridge), and found then both to be excellent whiskies. I'm almost ready to unleash their Peat Monster - it's been staring at me from my shelf for a while now, and I just finished off the last of my Highland Park 12. So far, at least, I've found the Compass Box products to be quite good. Their Orangerie (not technically "whisky" since it is infused with spices and orange peel) is a treat, too.
Being an all-grain blend, the Hedonism reminds me of a fine bourbon, but there's a mellowness with an underlying edge that says Scotland. Knob Creek, for instance, is more intensely sweet. As I understand it, Scotch grain whisky needs a lot of time in the cask to really be good without having malt blended into it. Kentucky's warmer climate and the use of virgin casks make bourbon age faster.
Cask selection and blending skill are critical for vattings and blends, though - I remember seeing a comment on Malt Maniacs about the "Sheep Dip" vatted malt: "Sheep Dip by name, Sheep Dip by nature." Then again, most single malts are vattings of multiple casks, so selection and blending skill are important for the singles as well!
As for Suntory Yamazaki 12, my bottle says "Pure Malt," so I would guess it's a vatted bottling; I've seen the much-more-expensive 18YO bottling labeled "Single Malt." Although the Yamazaki 12 has a very different nose, on the palate it seems a lot like a Springbank 10. Quite nice, even if it does have a screw top.