The W3C ethics are much broader and less rigidly defined than what the PC ethics try to convey, allowing for much more interpretation on the part of the user or creator despite both largely covering the exact same subject.
Planet, people, and prosperity functionally has the same intended meaning as earth care, people care, and fair share, but there is far less nuance in the PC method.
Some ways that I could emphasize the goal of slowing down with the audio project would include ensuring as minimal sources of sound as possible in an attempt to not overstimulate.
Depending on the location chosen, the listener may be able to pick out slight background noises from a nearby town or something similar by paying closer attention
