User blog comment:EmpyreanSmoke/Supernatural Q&A/@comment-80.44.49.90-20150730144331/@comment-24834479-20150805212635

A couple ideas in the writing room are 1.) These shapeshifter a are stronger because they are purebred, created directed from the Alpha, not mixing with humans, and 2.) This is a different breed of shapeshifter, also created by the Alpha, bearing different qualities.