When doing research in Logos 6, if there are resources you don't own but which might be of interest, they are typically listed in a separate category titled the Bookstore, which you can browse at your discretion. But when viewing resources from within the "Cultural Concepts" and "Ancient Literature" tools this is not the case. Instead, links for resources you don't own are intermixed with the links for resources you do own and there is no way to visually distinguish between them. If you want to limit your research to resources you currently own, this can result in a significant waste of time, hovering over references that provide no textual pop-up window or clicking on reference links only to be greeted by a new panel informing you that you don't own the resource referenced but you can purchase it.
I have made a uservoice request asking that Logos provide a means to visually distinguish between owned and un-owned resources in these tools via different fonts, font colors, headings, or some other means. If interested in this change you can cast your vote here.