I bought them from Gold's .. not from anyone local. I agree, it might be easier to ID once it starts growing.

Check to see if it has axial coralites (the ones on the tips of the branches). If it has them, then you know it is an acropora.

I have about 80 pieces of coral in my tank and can only identify most of them in generalities like sps-lps, etc. :confused:
Personally I think that green piece would look better in my tank with my other unknowns :razz:
Ask Albert from Gold's and he can ID what you bought from the store.