S1E15- Did anyone Get McKenna and Carly Confused Early in the Show

Especially in S1E15. In another post I saw someone thinking they look alike was racist, so I created a side by side comparison of two shots where they look extremely similar. There are certain scenes where it's very obvious they're different people, style of hair, lighting, with Diggle vs with Arrow etc, but especially the dating episode they look like the same person at several moments.

https://preview.redd.it/ogu8o7behqyf1.jpg?width=1343&format=pjpg&auto=webp&s=697427b11600278c6970846274445279e5628a88