I've only been a slave to the Obsession for a few months now and still learning as I go. I'd never heard of Bunjarra onion paste till I read this thread, so I did a Google Search and Cory Ander's recipe turned up straight away for PanPot's Ashoka Onion Paste.

As I read it, it was immediately obvious that this is basically what the Australian Indian Restaurant base "gravies" consist of. The gravies are adjusted with ingredients such as coconut, almond, vinegar etc to make a number of gravies in common use for the different "families" of curries such as butter chicken, vindaloo etc etc.
They are heavily caramelised and are pastes, although called "gravies". So I guess a curry made with BIR ingredients then enhanced with a Bunjarra would maybe fall half way between the two styles?
I'll give it a go - I often use red onions even in my BIR base, for the sweetness. Interesting that this is mentioned as an old school paste that was in use in BIR restaurants, and could explain why it became the basis of AIR curries as the first wave of restaurateurs came here from the UK rather than from the Subcontinent itself, courtesy of their acquiring UK citizenship then emigrating here.