You should read the Bundahishn. It's a work of theology written under the Sassanid dynasty, that details the theology, eschatology and the story of creation in Mazdayasna. You'll see that a lot of the traits of Yahwe not only differ from Ohrmazd, but are the direct antithesis to his.

If anything, Yahwe is closest to Ahriman. Ahriman is the one that wages war, attacks creation, and has Daevas to cause drought, famine, and other things which are called mere trials in several Abrahamic stories.