Yes it is SPS.
It is SO hard to id any SPS unless you cut a section out and look under a microscope.
We can only GUESS, and your pic is blurry and the frag is still kinda small to really tell yet.
It LOOKS like a plating type so far but it's not of the montpora sp.
On a good note, it looks like you got a good deal for $15.
Give it LOTS of light.