One nursery or two for identical twin girls?

Chelsea • Momma of 3 girls. Hailee Lynn 4/14/17 and Identical girls Hannah Michelle and Harper Lee 10/29/18

Trying to figure out if we should make one or two nurseries for our twin girls. We currently have a 14 month old daughter too, so I’m trying to figure out the best option so she doesn’t feel left out. I’ve had mixed answers about it and I would love to get some opinions from experienced twin mamas!