There is such a difference between the two stories, and neither of them are very exciting, but I can't at this time voice a valid opinion. I know that the Penny-Arcade guys can write some beautiful stories, so I'd rather let this one come to some kind of merger between the stories before I say how I feel about it. The most obvious theory is that the western world is a dream shared by those on the ship. In fact none of them can die (because it's a dream) however the outlaw is the only one they've actually tried to kill.