Oyster mushrooms come in many colours from white, passing through yellow, pink and even blue before grey and black. They do tend to hold their colour when very lightly cooked and who wouldn't want to do anything other than lightly cook them⁈⁈⁈ Young specimens can also be eaten raw in salads, but taste somewhat metallic to some people.
My local supermarket usually stocks 3 or 4 colours. My favourite are the 'golden' or 'yellow'. The choice of descriptor depends on which memberof staff is in charge of sign writing that day.
They also sell the yellow ones dried and they can be crumbled and added to salads.
There is no real difference between them in terms of taste, though.