Thanks! Yeah they are so stinking tricky. It is tough to see as well but baby 1 is a tad bit more yellow than baby 2, so I wouldn't be surprised if they were different genes. I'm going to try and post some additional pictures of the babies as well that might be able to show some additional details.
Here are some extra pictures:
Baby 1: https://i.imgur.com/9fZePH8.png
Baby 2: https://i.imgur.com/DMArmgH.png
Baby 3: https://i.imgur.com/sXjwCEZ.png