that looks more like the bubblegum monster chalice then the mummy eye to me.
If you didn't purchase it as a mummy eye with lineage then it's just one of the many color morphs. Names are just that....a name.
People but wild colonies all the time that are identical to the captive bred pieces
Some pieces just do better as they have adapted to our tanks and stresses.
With one caveat.. They are not captive bread yet. Some pieces just do better as they have adapted to our tanks and stresses.