I guess what I was trying to point out is that they're not the crazy greens social enviro anarchist party that you'd tend to think of if you heard of the 'greens' for the first time (generally). They're 'closer' but I agree I wouldn't consider them equivalent or overlapping on an absolute scale. The US center being quite different from the Aus center of course, but normalising across countries is bound to result in a loss of direction.
I do wonder if voting wasn't so constrained to party lines what we'd end up with though.