I would agree that they have some similarities, but the one on top
has a more compact coralite structure, and the coralites stay in
closer to the main body, whereas in the second coral the coralites
protrude alot more. Also the brances of the first are more stalky
and form a christmas tree shape. If you look at the upper most
coralites of the first pic, you can see that they have a horseshoe
shape, and the other has a very rounded tubular shape.
This is actually a wonderful example of why it is so hard to ID coral
I am confident that although these corals are similar at this stage
the colonies will look very different as they mature.
Sorry, I still don't have a good idea on the first one. Pretty corals.