The silicone used is the big difference. The Beginner, Intermediate, and Advanced rings are made out of a more rigid silicone. They don't stretch at all. They should be put on before an erection, because they're intended to fit around the penis and testicles both. It becomes more difficult to do later in the game, so to speak.

In fact, we sized them as B/I/A because during testing users told us that there was a bit of a learning curve. In the beginning, having a little bit of extra room to maneuver everything into the ring was helpful. As users got more confident, they generally wanted a tighter fit. Hence the naming convention. (Beginner = 2" inner diameter, Intermediate = 1 7/8" ID, and Advanced = 1 3/4")

Your Supersoft ring, as you probably know, is so stretchy that you can put it on anytime with no problem. It's also a touch thinner & smaller. Still a great product (our top-seller, actually) but very different than the classic rigid rings.