As a teacher we do see a difference between childrn who have been to pre school and those that haven't. Often this is mainly in their social skills and ability to cope without mum and be more independent as well as "academic" type things.
At least your DD is attending some preschool so would be getting most of that. I don't know the vic system so can't comment on curric. but its nice for children to go to kindy near the school they will attend so they have people they know starting school with them.