On one hand, no, there isn't. You put fire in one end, and suck out the other.
On taste alone, I rate most of my pipes about equal. I do have a few that for reasons of physics, magic, luck etc offer a slightly different flavor profile. My Radice really brings the sweetness forward in some blends, for example.
The big difference for me is that certain pipes are more comfortable than others, certain pipes gurgle less than others, or smoke with less effort and attention, never need pipe cleaners etc.
When I light my big Peterson Anniversary pipe, I know I'm done with the matches until the end of the bowl. It just... stays lit.
So that's what I have come to appreciate - pipes that behave well, and balance nicely and fit my teeth etc etc. Add into that mix the hope that the pipe smokes without issue, and I'm a happy camper.