From your pictures, it looks to me that pictures 2 and 3 are the same critter and are coloring up the same in your tank.
If so, you achieved your goal of buying 2 of the same thing.
As for coloring, everyone knows colors change depending on the water parameters, lighting, and stress on the coral.
Even when we can pick out a coral out of a tank at the LFS or a Swap, many times the coral will look different in our tanks.
If you really want to know for sure that they are the same critter, you can always bleach them and study and compare their skeletons.
Since they seem healthy, I'm sure if you don't like them, someone will buy them off you.
Best of luck,
Roy