If rush tickets go on sale when the box office opens, then yes, they will have tickets for both performances available. If rush tickets go on sale 2 hours before the performance, then obviously they will not have evening tickets when the matinee goes on sale. I believe for H2$, they go on sale when the box office opens.
This is true for any rush policy.
Nothing matters but knowing nothing matters. ~ Wicked
Everything in life is only for now. ~ Avenue Q
There is no future, there is no past. I live this moment as my last. ~ Rent
"He's a tramp, but I love him."