Colour and leaf shape are not a reliable way to distinguish between the species.
Typically you should use a published key to the species to differentiate, like this one
https://plantnet.rbgsyd.nsw.gov.au/cgi- ... name=Ficus
If you are really interested and have time to spare, then search up 'Figuring out the figs' by Dr Dale Dixon. He looked at hundreds of examples across all of Australia's 49 native species and was responsible for sorting out our current naming convention for Ficus. In the paper it gives measurement ranges across all of the species for all the parts of the plant. The easiest way is to find where the size of different features don't overlap for each species.
When trying to distinguish, you are actually looking across 3 similar species, plus an additional form for F. rubiginosa. So these trees could be:
F. rubiginosa f. rubiginosa
F. rubiginosa f. glabrescens
F. macrophylla
F. obliqua
Despite what some people suggest, there are very reliable ways to ID mature trees. I've noticed that immature trees in the wild can put out growth that can lead to an incorrect ID. I'd be concerned a tree in a pot may have this issue.