First one kind of looks like a purple stylophora, a bit hard to tell with the light color though.
If it does looks purplish, then it may be one.
I have a purple stylo, it's right up at the top, getting as much light as it can.
The second is definitely a spiny pectinia, and a nice one too.
I have one, it seems to like the bottom, low flow and light.
Which store in Atlanta?