1,3 is the more "used" dmaa. It's strong and fast acting. It provides that quick rush. 1,4 dmaa is not dmha. Dmha is 2-aminoisoheptane. 1,4 dmaa is a different breed from 1,3. It is still strong but it is slower acting. Almost like time release. 1,3 will get you there. And 1,4 will carry you...