Yes, according to the Google support rep, these are the same firmware
updates, unless they are mistaken. And the response from the Vizio
support rep seems to support that as well.
Update: on Jan. 18 I spoke to Google support about my casting troubles.
They informed me that, due to recent Google updates, they only support
devices with Cast firmware level of 1.52.272222 or higher. I found that
interesting. I checked my Vizio spe...
I totally agree that this is a Google f-up! I have 12 Vizio Chromecast
speakers, most separated into Google Home groups, that were casting
music just fine a couple months ago thru YT Music. Now, I do recall
installing both a Google Home and YT Music ...