There are several differences between Delta 8, 9 ,10 and other forms of Hemp-derived THC. The biggest difference is in the carbon bonds of each type of THC. The numbers in the name “Delta” refer to where the double carbon bond is located. In Delta 8, the double carbon bond is located in the 8th carbon. In Delta 9, the double bond is located in the 9th bond, and so on. It may not seem like a big difference, but the location of the double carbon bond is important.