Same and Different
Twins are often seen by society as one person. To some degree, this can't be helped, as first impressions are purely visual. If a person sees the same face, especially without interacting any further, he or she will likely see the two twins as the same. However, no two people are exactly the same, even if they may have near-identical physical features or are positioned the same way.
Models: twin sisters Yutong and Yunan Xue