Let $A$ and $B$ be unital $C^*$-algebras and let $\tilde A$ and $\tilde B$ be their universal enveloping von Neumann algebras. Let $C=A\otimes_\beta B$ be a $C^*$-tensor product of $A$ and $B$.
For which $\beta$ is there a relation between the universal enveloping von Neumann algebra $\tilde C$ and the von Neumann tensor product $\tilde A\overline\otimes \tilde B$ of the universal enveloping von Neumann algebras?