Lit: Rav Levovits also wore a shtreimal. The Williamsburg shul switched to Nusach Sefard a longer time ago than the other Viener shuls, I think. And the reason they switched was because the klal was already changing nusach. The shuls changing to Sefard wasn’t what caused so many of the Viener people who switched earlier.
A similar trajectory towards greater Chasidim could also be seen by Nitra, Kashau, Tzehlim, Krasna and Pupa.