Full Idea
What really makes for the diversity of two tigers is their difference in space-time location, from which their difference in component matter at any time merely follows as a consequence.
Gist of Idea
Diversity of two tigers is their difference in space-time; difference of matter is a consequence
Source
E.J. Lowe (The Possibility of Metaphysics [1998], 9.5)
Book Reference
Lowe,E.J.: 'The Possibility of Metaphysics' [OUP 2001], p.201
A Reaction
I daresay this is how we manage to identify the diversity of a pair of tigers (epistemology), but is that what their diversity consists in (ontology)? That they employ different matter seems relevant. If you feed one, the other stays hungry (causation).