I'm intrigued by the difference casing/curing makes in how a specific tobacco type will taste as an extracted flavor. I'm of the belief that curing and casing(s) contribute more to the extracted flavor than does the type/strain of tobacco itself. That's one of the reasons I like to try so many different brands of essentially similar tobacco blends, they all taste vastly different from one another.
Same here, I often wondered in the past if we were just extracting the casings, and vaping that. I never came to any meaningful conclusion, except that I don't think its that simple. I also agree with trying different brands as each tobacco processor/curer seems to an extent to have their own 'trademark' casing recipes.