It is practically the same thing as the AMEB (slight variances per grade), only the AMEB has a significantly broader range of repertoire in each grade.
Except for the fact that the AMEB standard is MUCH higher, not just the repertoire - but the difficulty in passing.
3-6 pieces of music. They will usually be stylistically different, such as - 1 study1 baroque work1 classical work1 romantic workan extra of what ever style you like