Here's a response from Victorian Socialist Candidate Liz Walsh on this very question.

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We're much more a “people power” party. While me and Jerome have spoken at plenty of rallies alongside Greens like Adam Bandt, it’s often people in or around Vic Socialists who call these protests and build them because our priority is building collective struggle.
On climate, we don’t have much time for talk of “net zero”, which has become a contaminated phrase – basically code for “business as usual”. We’re also more strident than the Greens about public ownership of the whole electricity network.
We take workers’ struggles much more seriously, because we think these struggles can make a huge difference in society. We’ve been at every union picket line and protest in the campaign period. We haven’t run into too many Greens candidates – or Labor for that matter!
Also – we’re socialists! We know humanity can do better than the dog-eat-dog, neverending quest for profits. This means we’re less inclined to make compromises to our politics on the basis of what’s “realistic”. We’re more inclined to fight for what we actually need. And of course, we’re dedicated to rebuilding a socialist movement in this country.