Another difference: Mangano Calcite is opaque and often banded. I have a couple small pieces which could be mistaken for agate.
My other pink calcite is translucent - like clear calcite, except tinted pink.
I'm thinking both Mangano and translucent pink calcite would have manganese in them. Manganese is what makes rose quartz pink, and obviously it causes Mangano Calcite to be pink, so it would make sense if it was responsible for translucent pink calcite as well.
I've heard Mangano Calcite called "marshmallow stone." I think it's very good for kids. For adults, it's good for reconnecting to the inner child, and helps you keep a healthy sense of playfulness and wonder.
It seems to share the energy of rose quartz, but is even gentler.