How are the Logudorese and Campidanese varieties of Sardinian different?

The distinction between the Logudorese and Campidanese varieties of the Sardinian language is primarily rooted in the historical introduction of different waves of Latin to the island.1

• Logudorese: Spoken in the central mountainous regions, this variety is considered the most conservative dialect of Sardinian. Its development reflects a long period of isolation, likely beginning in the 1st century BCE, due to the geographic and social conditions of the tribes living there. The northern form of Logudorese has historically served as the basis for sardo illustre, a conventionalized literary language used for folk-based verse.1
• Campidanese: Centered around Cagliari in the south, this variety has been significantly influenced by Catalan and Italian due to the island's history of foreign rule and external contact.12

Scholars have sought to develop a dual standardized norm that incorporates both varieties, acknowledging their distinct historical, anthropological, and linguistic evolutions.1