Taking these averages;
AZS has 14.99% higher recovery.
PLS has 4.29% higher lithium grade.
The lithium content of 6% CIF China spodumene concentrate usually falls into the range of 5.5-6.2% Li20 content.
Last average price of this $2,860 USD/mt.
CXO produces a 6% concentrate at 71%, while PLS produced a 6% concentrate at a long running average of 70-75%.
Draw your own conclusions from this.