I've seen a similar coral referred to as a "Stardust Montipora." Not sure of the exact species though. Montis are like acros. Literally around 100 species. Very nice coral. I haven't seen much of them.
I had it for a few weeks now and it's right under 250s mh. It's the same color as the colony and it's a branching type. You could also see some ridges on the left side.
edit.....are you sure its branching?? and not just "ridging". mine is defitnely encrusting not branching. That is not to say it cant form ridges or columns