These are my two favorite things right now. I've tried and liked Cornell & Diehl's Billy Bud, and I have nurtured a crushed on author shape pipes. But I found out I don't really know what actually is the so-called cigar blend. Billy Bud is described as having chopped cigar leaves in it. But what's the different between cigar leaves and pipe tobacco leaves? Aren't they from the same tobacco plants? Also, what defines the author's shape? For me, it's somewhere in between the prince and the apple; with straight or slightly bent stem. Is this correct? Thank you.