As for the superiority complex, I'm not sure I'd go that far. I could see her being rather naive being raised in white upper-middle class in very liberal upstate New York, but I don't think that would evolve into a full on superiority complex. The Jean vs. Emma thing was interesting though. Towards the end of Morrison's run is when Emma started to really resent Jean, where before she was kind of indifferent to her, although I imagine Emma got a little kick out if intervening in "little Miss Perfect's" not so perfect marriage.
But once Jean was gone Emma ruled the roost and she's slowly become not quite as interesting to me as a result. But one thing I always found fascinating was that even with Jean long gone Emma still really resented her. Why would she bother? Emma got to live, she got Scott, and she rose to be queen bee of mutantkind. For all sense and purposes she "won" right? Maybe, but I think there was still that nagging thing in Emma's mind that even though her standing rose considerably in the years following Jean's death, but Emma still has something of grudge against her for two reasons I think.
1) Because of the mind invasion Jean did and all the Phoenix stuff which is understandable
2) Because Emma knows that as great as she may herself may be, Jean still outclassed it her in practically every conceivable way.
Jean essentially became the Galahad to Emma's Lancelot, and there seems to be an underlying fear with Emma that one day Jean will come back and take everything away from her again. The fear god in Fear Itself knew how to exploit this:
This is why I really want teen Jean to meet Emma. Jean will have no history with Emma and thus a clean slate with her, but Emma will have all that running around in her head. She's bound to feel SOMETHING.