Hmm the main difference is in color and scales, The color is completely different, and the scales also are different they have a much more rough shingly appearance. The difference in scales doesn't really show in the pics, but the color will. heres the few i have.
that pic is a bit blurry, but you might be able to make out the roughness on its back, Unlike the normal smooth skin of skinks,
This ones clear but to far away to show the roughness of scales clearly although it is somewhat visible. (the brown area around the shoulders is the last piece of a shed)
I would love to find a male like her to breed her with.
Devon