Lithium Apples & Oranges

Hi Folks,Hoping to get some clarity from the Lithium gurus here on comparing Brine and Hard Rock production amounts for two of the best producers available on the ASX.

So Pilbara (PLS) mine 2Mtpa which produces 330Ktpa of 6% Spodumene. As I understand it that Spodumene is then sold/exported. If I covert that it means the content is 19.8Kt of 100% Spodumene, which in turn is 8% Li2O (Lithium Oxide), giving a theoretical Li2O production of 1584 tpa

Orocobre (ORE) currently produce 3300 tpa (eventually ramping up to 42.5 Ktpa) of Li2CO3 (Lithium Carbonate) which is then shipped to Japan to be converted into LiOH (Lithium Hydroxide) - However, I don't know the conversion percentages of Li2CO3 -> LiOH.

Does anyone have better figures than these to compare these miners? - I do understand the production and refining costs will be different but would like to know the raw tonnage of battery-grade Lithium each produce.

I've posted this on both PLS and ORE forums to try to get a full perspective.