Of all the blends mentioned, I've only smoked 2: Irish Flake and Jack Knife Plug. I can definitely attest to the high vit N content of both. The taste and experience of the two are very different though. IF is a very straight forward, strong, quality VA flake. JKP is most unique and unusual imo...and very good. Don't really know what to compare it to, but it's definitely got a taste all its own imo, and anything but boring. In one of the articles or reviews I remember it being said that if Clint Eastwood's man-with-no-name, spaghetti western character smoked a pipe, it'd be loaded with JKP. I'd have to agree. I suspect it was what Col. Mortimer was smoking in For a Few Dollars More.