Based on the article, it is clear one big advantage for Pyro jumps out at me right off the bat. Rio Tinto's production rate is stated in the article as 10kg/hr. Pyro produces 25kg/hr*. This is a massive advantage in terms of cost/kg andultimately bottom line profitability although we cannot be sure what Rio's costs are comparatively, this is clearly a big advantage.

*As per the below post by Peter/Rodanya stated Pyro's production rate is 25kg/hr. Source is here:

https://agoracom.com/ir/PyroGenesisCanada/forums/discussion/topics/759298-questions-related-to-the-new-production-line-for-am/messages/2312758#message