I have smoked all four samples. I am now on my second pass of C and D samples.
I like C very much and would reach for it as part of my rotation. It smells great in the bag. Has lots of VA and a darker tasting tobacco, maybe a Perique and a pinch of Lat. Balanced and transitional, moving from a bright citrus twang to a lower thrum as the bowl progresses. Hallmark of Pete's tobacco is the clean, dry burn. I really like the cut of the leaves, much like my signature blends. A little chunky, leaf is distinct and I believe that aids the flavor bumps I crave.

Blend D is a bit of a mystery to me. It may be a VaBur and might have some Kentucky. Or not. It tastes "tobacco-y" which is a hallmark of Burley, in my limited experience. It has a little kick and a more sour note. It goes out a couple times, which is rare in my case since I'm a fast smoker. The retrohale is pungent and not super enjoyable. No bite, another hallmark of Pete's work. Tastes the same going in as going out, would be okay if you were working and didn't want to be distracted. I'd rather be distracted.

So far, I'd love a tin of C with about a year on it. The only better blend so far is my Outdoor Incense, which is an Oriental forward bombshell. That stuff is money!