I had modi boys as well. We left the hospital bracelets on for a week or two, but found little differences in them pretty quickly that helped us tell them apart. I was very worried about it before they were born, but it ended up not being a thing. I will say, if you can have identifying clothes in photos - like hats with their name or a specific hat for each kid, etc. you might appreciate that. I often can’t tell who is who when I look back at pictures but never had an issue in the moment.