The others are far less balanced. I definitely saw the mouse first, and the face, but it only took a few seconds to figure out the other one. For the cowboy/ind

The others are far less balanced. I definitely saw the mouse first, and the face, but it only took a few seconds to figure out the other one. For the cowboy/indian, it took me a good 30 seconds to figure out what the other image was, and it turns out it's because that image has a really distorted and disproportionately-sized face. The original rabbit/duck is by far the best of the lot because both images are equally valid.