Look-a-like . . . or not?!?

I have had so many people say "Your boys look so much alike." And I have had others who say that they don't look anything alike. To me, they are so different with their own personalities, and yet, they resemble each other and you can definitely tell they are brothers. I was looking through some of their pictures. There are some baby shots that really look alike but these below, Sy is 14 months at the time and Vin is 15 months in his. Whatcha think? (To me, some differences I have noticed: Sy had more curls and thicker hair. Vin has dimples. Sy's face is a little rounder. Sy wore size 7 shoe by 12 months. At 18 months, Vin is still wearing a 4. Vin's hair is light brown, almost red. Whereas, Sy's hair was light blonde).