Perhaps that is the case for NSW, but the Festy Vic mapping is pretty average, and is getting on for 7 years old.
I picked a random section of Victoria - well not entirely random I had trouble getting through this area during floods a couple of years ago - and cropped the mapping to cover a similar section just to demonstrate how different the coverage really is.
First up Festy.org mapping (Ozi) - Free
https://www.aulro.com/afvb/images/im...012/11/359.jpg
VicMap Topo 25K (Memory-Map) - $99 for 2 x mobile device, $150 2 mobile + 2 desktop, $199 for DVD.
https://www.aulro.com/afvb/images/im...012/11/360.jpg
SpatialVision VicMapBook imagery 50K/100K (Ozi) $149.00 DVD Only.
https://www.aulro.com/afvb/images/im...012/11/361.jpg
GA AusTopo 250K (Ozi and Memory-Map) Free//Cheap
https://www.aulro.com/afvb/images/im...012/11/362.jpg
Hema Victorian State Map (Ozi and Memory-Map) On DVD for Ozi $179, or Part of Region 1 download for Memory Map - $60 for 2 x mobile and 2 x pc.
https://www.aulro.com/afvb/images/im...012/11/363.jpg
One of the hallmarks of usable GPS mapping is the ability to see the information you need at a zoom level that gives you reasonable coverage.
cheers
Paul

