The simulacrum is the true character or form

When eternal return is the power of (formless) Being, the simulacrum is the true character or form – the "being" – of that which is. When the identity of things dissolves, being escapes to attain univocity, and begins to revolve around the different. That which is or returns has no prior constituted identity: things are reduced to the difference which fragments them, and to all the differences which are implicated in it and through which they pass.

Gilles Deleuze, Difference and Repetition (Continuum, 2004) p. 80