That's the issue though............is spathulata even a separate species? Veron doesn't recognize it anything more than a millepora that gets heavy reef crest flow.
The two tone colors & being from Aus. might be all that makes it different.............not sure the coralite structure is different.
The coralite structure is definitely different, IMO. Whether that's because of environmental conditions, or genetics, or both, I obviously cannot say.
Pretty clear here that the first one would be called a spathulata:
http://www.sdmas.com/corals/47.php