I have been farming this species for a number of years now. There are 2 species that I know of, Bali/Indo and the E. African. I farm the E. African strain. I have seen a ton of the Indo/Bali strain at the wholesalers in Calif. and it dose not compare (more pink to it). The gold flecks (spicules) are not there, the polyps are not gold. I believe it is found deeper than the African strain. On the African strain you still have to shine a light (or flash) from the side to see the flecks. Lighting and h2o quality seem to play a part in the spicules also. Lg. Colonies you find in the stores are more than likely coming from Indo/Bali via the L.A. wholesalers.
I know when I had my display with black sand black back and sides with light coming in only from the top and front I could see the spicules more clearly. What I am getting at is that you will see blue all the time but the spicules are not as easy to see. Under intense light the polyps will turn gold and it may be easier to see the gold flecking.
Over the last couple of yrs. I have sold many pieces directly and indirectly, probably to alot of people now selling their frags on this and other forums. They are very similar and with high light I would guess the Indo/Bali strain can look very close to the E. African strain.
Please don't think this coral will always show its gold flecking, otherwise you will be disappointed. I will try and get some pics with a flashlight shinning on one end so you can see the difference.