....how big a piece of paper have you got? They are different in nearly all aspects.
Pretty much the obstacle protection areas are constructed differently and the minimum obstacle clearance figures are different....there is a stack more but that is about the crux of it
All AsA DAP plates are designed to PANS-OPS criteria, some RAAF plates are TERPS as there are miltary type approaches that aren't covered in PANS-OPS.
The links above will answer what more specific questions you have....be warned they are thick manuals and some of the language used can be a little confusing
Alpha