Maester Steven, is the Latifundia system used along the lower Rhoyne colonies capable of producing more food per capita than the agricultural model used in Westeros? Secondly, was it high levels of urbanization along the Rhoyne that necessitated the development of this system or the system that allowed the development of large urban centers?

More vs. less isn’t quite the right way to think about it. 

Latifundia, like later plantations, basically involved large gangs of slaves working to produce monocrops for export, so they were more specialized and had a lot of manpower tasked to that one specialty. 

Whereas while the Westerosi system is probably less efficient at producing one crop at volume, it’s more diversified and self-sustaining.