Comparative studies of European social policy have pointed to significant differences with respect to the way in which diversity is valued and understood, contrasting nations that have adopted strongly compulsory and integrationist policies with others that have pursued more voluntary and pluralistic approaches. Within the higher education sector specifically, although there have been numerous European-level initiatives to encourage national governments to take action to widen access to university, we know relatively little about how key policy actors conceptualise diversity with respect to the student population, and the extent to which such understandings are shared across national borders. Drawing on in-depth interviews with a range of 'policy influencers' in six European countries and an analysis of relevant policy documents, this article suggests that dimensions of difference are not always valued equally and that, despite policy imperatives promoting higher education homogenisation across the continent, some significant differences between nation-states endure.