Stimulated by the rise of music recommendation services, the visualization of music collections has undergone a remarkable transformation over the last decade. In this communication, we focus on the visual comparison of personal music collections. We introduce an interactive and tridimensional system which allows their visualization using a music archipelago metaphor and relying on a facet-based engine. In the industrial context of music related services where social and sharing aspects are omnipresent, we also present a novel feature to enable the visual comparison of music collections.