I've noted differences between Noah and Jude before, but I just had to make note of this particular difference.
Noah calls me either Mama or Mom. Very rarely will he call me "Mommy".
And Jude calls me Mama or Mommy. It's absolutely heart-melting to hear him call me "Mommy", I'm not going to lie.
It'll be interesting to see if Noah changes what he calls me and if Jude drops the "Mommy" once he starts talking more.
My siblings and I called our parents Mommy & Daddy for a very long time and I had to tell myself (I was at least in my teens...longer, possibly) that I had to start calling my Mom, Mom and not "Mommy" anymore. And same with my Dad, although "Daddy" still slips out every once and awhile. For some reason it seems more socially acceptable for a daughter to call her father "Daddy" even once she is grown.
I like that my kids call me "Mama", though. It's warm and nurturing I hope it stays in their vocabulary for a long time.