Dreams are usually a sequence of uncoordinated events that don't have any logic to them. NDE's are different. NDE's are a coordinated set of experiences with a theme: I'm floating, I'm leaving this world, Hi dead family, Hi angels, I don't wanna go back, OK, I'll go back.
But dreams are totally uncoordinated. I've had dreams of being in school (high school or kindergarten), then trying to go home, but I can't find my house because I don't remember where I live; crazy illogical stuff like that. NDE's are not dreams.