I suggest you check out Boost Mobile as well:
https://boost.com.au/plans/?gclid=Cj...E&gclsrc=aw.ds
Boost are the ONLY Telstra reseller which operates on the
complete Telstra network - all of the other Telstra resellers (including Aldi) use the Telstra Wholesale network (a.k.a.
"parts of Telstra's 4G and 3G mobile networks"), which is only a subset of the full Telstra network.
In major urban areas, it generally won't make much difference (if any), but if you get out into regional Australia with areas of "spotty" mobile reception, phones which are on the full Telstra network will often hold a signal after all the other networks have lost signal altogether. Check the coverage maps by zooming in to a regional town (such as Roma, QLD) to compare the different coverage.
https://www.aldimobile.com.au/coverage/
https://boost.com.au/coverage-map/