Wedding Cake from one breeder and Wedding Cake from another can differ by ten points of THC, because the name is just the starting point and each company made its own cross. Nobody owns most strain names, so a dozen versions exist and only some were selected with potency in mind. Listing the breeder next to every strain, which https://potentthcseeds.com does by default, avoids buying the wrong one by accident. Always check who made the THC seeds, not just what they are called.