That will depend on which graph database you use as a graph database might just store the graph in an underlying relational database. And it will also depend o

That will depend on which graph database you use as a graph database might just store the graph in an underlying relational database. And it will also depend on what kind of data you have and what kind of queries you want to perform. For a graph database it might be faster to navigate along links in the graph but I would guess you will have to pay a big performance penalty if you have to operate orthogonally to your links, like aggregate across all instances of some entity.