I would say that technically they are called blue shrooms, even tho they look purple. Not sure, but I think Tonga are the true purple shrooms. The newer shroom may be the same, just may be getting used to its new home and the color may change. There are so many shroom types that its probably impossible to ID anything specific other than by color. Hopefully yours will stay the metallic green, I love diversity.
You've got some very nice shrimp too, love the pair of cleaners. And, nice pics, BTW.