Superman vs Thor

[mpstjohn]

I'd have to base what I know off of the movies since I barely read the Thor comics. That being said, I'm fairly certain Thor and Loki can both die. Their dad almost died of a heart attack when he told Loki he was adopted. By comparison when Superman went through similar emotional distress when he lost Lois Lane he reversed the rotation of the earth, turned back time and saved her. Even when Superman dies he comes back. That and his powers aren't reliant on a hammer or some other sort of accessory he would need to make him stronger.