Thread:Nurdboy42/@comment-3406131-20190211175516/@comment-11220539-20190211180416

The Marvel Appendix confirms the two are one and the same. As per Dave Sexton:

"Zoroastrianism believes in a constant struggle between opposing forces of good and evil. My original thought with Zoroaster was that he was connected to the Eternals and Deviants. He is actually the Zoroazztor that appears in Conan in possession of one of the Cornerstones of Creation, the Serpent Crown. He sought to use the tainted artifact for good and it broke his mind. I don't know that this works with the timeline. Maybe after Conan claimed the crown, Zoroaster recovered, started Zoroasterism and eventually became the SS."