In this paper, we present a comparative review of five countries: France, Italy, Poland, Romania, and Spain, focusing on the interplay between smart-working and smart cities. This aims to derive insights relevant for industrial relations. We spotlight the differences and similarities these nations share in the evolution of smart-working and smart cities. Our analysis dives deep into the territorial aspect, such as urban vs. rural areas, leveraging a comprehensive data set we've gathered. We conclude by addressing upcoming challenges in industrial relations.