NABBA and WFF are independant bodybuilding organisations with different categories for competitors.
NABBA Divisions are based on contestants' heights, and allows contestants to determine a suitable balance between their bulk and their toning. It is often referred to as "Hardcore".
WFF Divisions are based on both contestants' height and weight. This leads to a different build of contestant and the focus is more on athletic physiques rather than the large bulk of traditional body building competitors. WFF has also introduced new categories for fitness, aerobic and swimsuit competitors, encouraging different looks while promoting good health and fitness. It is often referred to as "Natural".
The two organisations are both different and complementary, as competitors who compete in NABBA categories can not compete in the WFF categories.
Contestants can compete in two competitions each year, Mid-year and End-year.
For NABBA, the competitions are NABBA World Championships (Mid-year) and NABBA Universe Championships (End-year).
For WFF, the competitions are WFF Universe Championships (Mid-year) and WFF World Championships (End-year).
NABBA/WFF Australia is the competition organiser for the Australian qualifying events for both the NABBA competitions and the WFF competitions. As the same organiser is promoting both competitions the actual events are held concurrently at a single venue, joining them into a single event while maintaining independence in judging and awards.
NABBA/WFF Australia combines the Australian qualifying events for NABBA Universe England and WFF World Championships into a single event which is called "National Championships" this event occurs two weeks before the NABBA Universe.
At the international level, the NABBA competitions and WFF competitions are completely separate events usually in different countries.