I've had the chance to assess a small house I've designed in the Huon Valley. It is in a very shady site and in this case not designed to the Passive House standard.
Struggled to get the equivalent of 5 stars with the Passive House software. However getting it assessed with First Rate 5 it recieved 7.6 stars!
It shows the Passive House Software is much more rigerous, particularly in areas of thermal bridges and shade & window data.
Passive House vs Australian software