Prime and WIN’s branding were god awful at aggregation in '89 - but lifted their game in 1990 as the Ten Network re-branded CTC with the X logo and subsequently TV Oz.
Here’s 1989:
Versus
and
Here’s 1990
Versus
and
My argument with the programmers at Prime was along the lines of “If you’re showing the exact same promo in Victoria as you are in Bunbury, how can you say it’s “local”? It’s just generic!”. You are right though, they were trying to make out that ‘local’ television was in some way better. This attitude developed at the time when pay TV was coming in to Australia - and country viewers were turning to Galaxy (as it was then known) in DROVES.
It’s worth noting that Capital stopped producing local news in the Illawarra in 1989 and never produced local news in the Riverina and Central West - whereas Prime were big investors in this area. So they did have their money where their mouth was on the ‘local’ front!