That's what I've read, too, i.e. intent to settle, or not. Maybe wanting to move forever (i.e. migrant) is more common, if one is from a poorer country, which

That's what I've read, too, i.e. intent to settle, or not. Maybe wanting to move forever (i.e. migrant) is more common, if one is from a poorer country, which could explain why some others here thought that "immigrant" implied "poor and less educated".