wolverine I suspect the sp will most definitely hinge on one very significant factor that we haven't spent much time discussing. It's a bit of a 'can of worms' although I don't think CLQ will be food for the worms.
All the current lithium producers and the future ones as well can and will be able to produce lithium carbonate and even achieve a purity to meet the requirements of the battery industry. BUT! And the 'but' is.... at what cost?
Most of the lithium brine salts carry unwanted baggage, some of which is very costly to eliminate. And it takes time to evaporate, and purify both chemically and electrically. My understanding is that with hard rock lithium, the ramp up to battery grade material is faster, simpler and far less costly, notwithstanding the fact that open-pit mining will be more expensive than pumping brine into evaporation ponds. So it will come down to the economics for delivery and I think CLQ is the more economical. AND don't forget 'location, location, location'.
My personal bet is that CLQ will place better than fourth in significance. But, we'll have to wait for news (soon) from CLQ to get clues.