is there really a difference

so is there a difference between pastel ghosts and pastel orange ghosts? im getting a female but she hasnt shed yet so I cant tell the difference at all its just curiosity

In short, NO.

But, there is an outside chance she could be a line of Hypo that is not compatible with the standard OG. I would ask.

No there are different lines of Ghost and the most commonly used are compatible.

I work with Orange Ghost, Bell Line and Butterscotch and all 3 are compatible with one another chances how if you find a POG it will be one of those 3 or a combination.