Fancy names don't mean much in the grand scheme of things. With experience you'll find you can be sold something and in your tank it'll look different, or it'll change. In the past I've picked up some really sad looking corals that turned in to some of the most beautiful I ever had with the correct care.
Zoas can morph spontaneously over time, or part of a colony can change due to different lighting etc. I can confirm that yes, you appear to have two different color zoas on that rock.
The internet tells me a "Green Goblin" is meant to be a type of rock flower anemone. So no, that is not a green goblin. It is a (mostly) green bubble tip anemone, I had a few the same as it years ago.