Well you could tell me how I'm wrong. I've had the two channels for a couple of years and can't recall once flicking over to the other and seeing a different show on.
I have had several things to do with NBN over the last few years, and can also say that you are wrong. NBN has different news bulletins for the 6 areas it broadcasts into. They also record 2 weather updates and several news updates throughout the day, again, one for each region it broadcasts into.
NBN also broadcasts the various Local rugby league grand finals, ie, the Central Coast Grand Final was broadcast into the Gosford area, and the Newcastle Rugby League grand final was broadcast only into the Newcastle region, not the rest of the regions, such as the Gold Coast, Mid North Coast, Far North Coast, and the Central Tablelands.
NBN also broadcast 6 different telethons last year, one into each broadcasting region.
So, there you have it, programming varies in each region. The news in Newcastle, Taree, Tamworth, Port Macquarie and Gosford is different to the news you recieve on NBN QLD.
Two years? You obviously dont look very hard do you.