Probably more dualistic -- the earliest forms of Zoroastrianism had strict dualism - there were two equally powerful, opposite gods - the God of Light (Ahura Mazda) and his brother Aingra Mainyu, the God of the Lie. They were equally omnipotent, ancient etc.
Later Zoroastrianism - Zurvanism, dating from 100 to 200 AD, proposed Zurvan as the originator and Ahura Mazda and Aingra Mainyu as emanating from Zurvan.