My LFS is always getting different types of live rock (most look the same) the difference is where it (suppose to be) coming from. Another LFS said its all mostly the same except for the mains Fuji, Tonga, Marshall, Happia, Florida deco, ect, ect, but then you get people that say its from a certain island and call it that type but would still fall into a catagorie of one of the above. Just look at the rock see whats on it and make sure its not to dense the more dense the less rock you get.