Tried both A and B today. I found that
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Alligator Gar
's comments about D to be pretty relevant to A, actually. Otherwise, it gave off lots of smoke, which I like, but I found it to be almost cigarette-like. The smoke seemed dry somehow, like burning leaves (non-tobacco leaves) or paper. It seemed harsh to me, and though it didn't bite it kind of irritated my throat and sinuses. I don't know if that's Burley or the specific combination of ingredients or what. I'll give it some down time and try it again, but so far this one is not for me.
B on the other hand I found immensely enjoyable! Nice rich VA flavors, and it just seemed to get better and better, and more complex as I made my way down the bowl. A figgy fruitiness, a distinct floral quality about halfway through, and a surprising hint of mustard on occasion (or maybe I'm just weird). I'm guessing there's Perique in there because there's also some pepper. It smoked smooth and easy and left hardly any dottle. A very nice smoke.
Pete, will you reveal identities and basic components once everyone has weighed in?
Looking forward to progressing on to C and D!