diff. between audit assistant and article assistant

More or less there is no major diff. Audit assistant is a old term which now called article assistant. please reconfirm.

The main difference would be that an 'Articled Assistant' has to work for 3.5 years while an 'Audit Assistant' has to work for 4.5 years. Also, an Audit Assistant would have to do things relating to audit only whereas an Articled Clerk may also be told to do various other work such as filling forms, filing returns, etc.