I think she has Specter in her......
But in all seriousness it can be an issue since not ALL of the markers may be there.
The head can have a stamp:
Often the tail will be striped:
Belly is variable:
Overall color is lighter than a WT, and easier to see when next to a normal:
There is also something about "keyholes" in the pattern, but I never really understood that one.
As was said before, if it is your first get it from a known SS producer if you can.