I recently replaced my Qb 1s with 2nd gen. The sound quality is better, but not by a mile. You’ll clearly hear it when A/Bing, but wouldn’t be so sure I could tell which is which if any significant time was in-between sessions.
@JosquinDesPrez Indeed as @ChrisSU mentions, worse WiFi, only (802.11g) 2.4GHz, and worse reception at that. No Chromecast, which is easily solved with a ChromeCast Audio dongle, but with only one port you’ll have to get a splitter/switch. Plenty available from Amazon and the likes, and a few have remotes as well.
That’s another thing, the Qb 1 doesn’t have a remote, so you’ll have to use the app. And don’t expect any updates like Tidal or Qobuz connect, Amazon HD etc. Apple HiFi perhaps as weirdly they did at some point add Airplay2.
There’s no large buffer like in the new generation streamers, so it’s more prone to hiccups when playing higher bitrate streams, especially an issue with the above mentioned WiFi limitations. But if you mostly use it for the TV, than that’s probably not an issue.
This all sounds very negative, but I do think the Qb1 is still an excellent device if you’re aware of and can live with the limitations.