Can Australian users agree on using a single frequency plan?

I’m looking at installing a couple of gateways, and rapidly getting to a point where we need to lock in the frequency range that we want to use. Multiple organisations that we’ve spoken to are recommending AS923 (which is where we are leaning) for new installs, however there are existing gateways around using AU915.

So agree that it would be good if we could generally agree on which frequencies the community is encouraging use of.

Even within AS923 there are the two options, is there a general preference for one over the other?