Do they look identical?

Lisa • Mom of 4 boys and one baby girl. Mom of a high-school graduate, preschooler in heaven, 3 year old twins and a 1 year old princess.
I don't think they do but the nurses keep asking us if they're identical. They have the same blood type and if I go back and look at pictures I have to think about which one is which. Maybe I'm just worn out and my brain is exhausted from going back and forth to the NICU, poor babies. My mom even started mixing up their names today. So identical or not? 
This was at 4 days old
This was yesterday at 12 days old