Full Idea
Our relation of 'in virtue of' is among facts or truths, whereas Fine's relation (if it is a relation at all) is a relation between a given truth and items whose natures ground that truth.
Gist of Idea
Things could be true 'in virtue of' others as relations between truths, or between truths and items
Source
Gideon Rosen (Metaphysical Dependence [2010], 07 n10)
Book Reference
'Modality', ed/tr. Hale,B/Hoffman,A [OUP 2010], p.119
A Reaction
This disagreement between two key players in the current debate on grounding looks rather significant. I think I favour Fine's view, as it seems more naturalistic, and less likely to succumb to conventionalism.