What would be the difference between a Seer and Mage of Doom?

A Seer of Doom would learn to know about the bleak future and the death that will happen in their Session, think if Rose, rather than seeking about the nature of SBURB and the Green Sun, began to dig through the lore of the Consorts about every bad thing that happens in the story, about the creation of Bec Noir, about which of the Heroes Die and Ascend…

Meanwhile, a Mage of Doom, like Sollux, has deeper insight of the bad things that are happening, he’s literally assaulted by the screams of the imminently deceased, and knows about those around them going to die, and their team going to be Doomed in visions.