Meh.....that's what I figured all along!
i have both hanging on my wall. i am probably one of the few that have the ability to hold both in my hands at the same time. there are differences beyond just the part number. the material used on the bottom layer of the belt is a different color, so i can only assume its a different rubber compound. the price difference is a good piece as well. i pay right at $50 bucks more for the 364 belt than i pay for the 212 belt, and they both come from the race department. why would someone sell me two identical belts, for a completely different price. to paint a number on the belt does not cost them an additional $50, but they charge me that much more for it. if its metal, i can tell you all about it, but being that the belts are rubber, i dont have the mechanical background to break down rubber and tell its differences. visually i can tell you the belts have a different color to them. so somethin has gotta be different.