The top photo has subtle differences from the original artwork for all of them, but most of those are attributable to different media and years upon years of technological update. Snow White in that image hadn't undergone any significant structural changes. Some richer colors is about it. same with the rest. The Animators reference is the original. Some more vibrant colors is pretty much the only change.
The new images on the other hand represent structural changes to the character's features.
The new images on the other hand represent structural changes to the character's features.