Here let me throw out a generality for you.
Family Xeniidae includes the genus Xenia, Anthelia, Cespitularia, and Heteroxenia.
Xenia pulse, which means their polyps open and close repeatedly.
Anthelia do not.
Anthelia grows in a mat, where as Xenia grows out from a stalk.
Are your coral polyps pulsing? Does it grow from a mat or a stalk?