It would be impossible for the picture to be re-shot and everything put back in the original position.
I don't see any shadow conflict on the mirror. When you blow them both up to a larger size, it still fits. During a real snowfall, shadows nearly disappear due to the reflected light scattering by the snowflakes causing the ambient light, coming from all directions, to diminish shadows.
Other than the added "snow" on the lighter picture, they are both identical even down to the pixel level.
Got the same results using Corel Photopaint.