>>2388135Biggest difference is bent versus straight stem. Bent is gonna put the pipes center of gravity closer to you, so many people feel they are more comfortable for clenching - just holding it in your mouth, without your hands, that is. You don't feel as much force on your teeth. Bowl shape is largely aesthetic. If you like having a small pipe, the Ropp Etudiant line is a reasonably priced small briar. Picrel is the rough size of the line up. I have the J10 shape, which is slightly longer, and I love it.