Good old stainless steel wins by a large margin over those products touted as being ceramic. These ceramic products are, in reality, just mild steel that is coated with ceramic. While this gives them excellent thermal resistance, they do not offer anything by way of strength and corrosion resistance.
On the other hand, stainless steel offers both strength as well as protection from corrosive components. When you apply header paint to stainless steel headers, you add that tough layer of protection that also has thermal insulation properties.