They are different "lines" of Pastel that are all compatible. Each line just has their more typical "look" (bright yellow, blushing, crazy pattern, etc.). I don't know what you mean by "Orange Pastel" though. Orange Ghost is a separate gene (if that's what you meant). Some Pastels do have orange on them which browns out as they mature. I'm not sure which of those you mean.
Here are some of the different lines:
Graziani Pastel
NERD Lemon Pastel
Blonde Pastel
Pastel Jungle
Matrix Pastel (I think that's what they're called. I haven't heard anything about them in a LONG time).
Reply With Quote