I'm indirectly working with Orange Ghost (not breeding for it-just have it hanging out in the background).
In Normals I don't see any Het markers that could not be found in a typical wild-type coloration.
If I have a Pastel and I hold a Pastel Het Orange Ghost sub-adult side-by-side I will notice that the Het OG offspring has a little bit more 'orange' blushing near the belly scales when they are sub-adults. This coloring fades over time as the snake gets older/larger and in a Het I see no traits as an adult.
Note: Orange Ghost can be confused with Hypo (Ghost). While the lines are compatible like Lesser/Butter (to make BELs)-Personally I would use the Orange Ghost Line in snakes where you want more yellow/orange color tinge, and the Hypo ghost line where you want less black.