I noticed that yesterday moments when the apartment went live with the twins. So I deemed her Mia in my mind from then on since that was the only discerning feature unless someone comes up with something new. So to answer your question. Yes that is the twin who had the bracelet on yesterday.
The twin closest to the closet door is Mia. You can see her birthmark on cam 5 but cannot see it on night vision on cam 6. On night vision it washes out.