Strawberry shortcake is another one of those corals that there are hundreds of different kinds. It is more of a general name. Wild colonies are imported all the time. There are nicer ones, and not-so-nice ones.
The real Strawberry Shortcake came from Unique Corals and debuted at MACNA 2009. For a limited time they sold frags on uniquecorals.com.
The real one does not really look like all the ones floating out there in my opinion.
I have a frag of the original, and its the only SS I have.
You are correct in noticing the difference, as they are completely different wild corals. Some do well in captivity, some do not. They are still somewhat uncommon though, and still require premium prices. Many people just call them all Strawberry Shortcake, even though they really aren't. They are usually nice corals still and worth the money. A lot of times its hard to know what they will color up to being wild and still new to aquarium life. Sometimes you can get a minicolony for 50$, sometimes 1/2 inch for 50$. Depends on how nice of a coral it is and how long in captivity.