User blog comment:Lecromis/Sithis: At least a god? The true God of Life and Death?/@comment-4858067-20120828190606

I'm not entirely Lore-savy myself, but from what I understand, Sithis is more like a barely sentient void. The Dark Brotherhood speaks of him as a Death God, but he's not. That's Arkay. To give the best real-world comparison I can think of, Sithis is like Cronus to Akatosh's Zeus. Sithis is what came before the nine divines, just as the Titans came before the Olympians.

Not the best comparison I'm sure, but it was closest I could think of.