Equality of asymptotic redundancy factors for multiple bursts and substitutions

Let $q$, $t$, and $b$ be constant positive integers with $q\geqslant 2$. For the multiple burst-substitution channel $\mathfrak{ch}(t,b)$ and the multiple substitution channel $\mathfrak{ch}(t)$, write $r^*_{\operatorname{asy}}(\mathfrak{ch},-1)$ for the asymptotic redundancy factor.

Multiple burst-substitution redundancy conjecture.

$$r^*_{\operatorname{asy}}(\mathfrak{ch}(t,b),-1)=r^*_{\operatorname{asy}}(\mathfrak{ch}(t),-1).$$

This extends the known equality between the asymptotic redundancy factors for a single burst and a single substitution channel to the case of multiple substitutions and bursts; the equality remains conjectural in the source.