FWIW,
Alevopora sp. has 12 tentacles per polyp
Goniopora has 24 tentacles per polyp
Alevopora isn't actually a 'true' goniopora, but is actually easier to care for, compared to the goniopora, and most of the time has a branching growth going on. I had one in my tank, which at first I thought was some species of SPS, that lasted 7 months, before it died out for no reason.
Good luck!