That all of my briars taste different then each other. Nothing dramatic but for instance the stewed fruit Virginia quality just pops more in my Rattray. My churchwarden makes the molasses notes in burly more distinct. And well they've been like that from the start. I have no clue what makes the difference including if I just smoke different pipes differently. But I swear there is a slight but noticeable difference in the tastes of every briar I own. And no it's not ghosting, I generally smoke the same thing most of the week in different pipes. And to give you an idea of how minor it is, it really only stands out in blends with multiple components.