Having just worked through a purchasing decision between BS1 and Level, B&O sure doesn't make it easy. Just when you think they've given up on Spotify and are going all in with Deezer, they release the Balance and Level which don't support Deezer, and only support Spotify, but no NL (so Spotify Connect doesn't really matter that much to me as I want Spotify Connect so my devices can "join" Spotify streams over NL). All in with GVA? Nope, A1 now does Alexa. At least they've standardized on TuneIn. Nope, Level/Balance does B&O Radio instead. What a mess.
I think their plan was to go all in with GVA (and they may have even said this at one point) so, if you're using GVA as the primary interface, then built-in streaming services and NL do not really add much. You just say "Hey Google", and Chromecast figures it out, and it also handles multi-room. I'm sure there is licensing associated with including built-in services so why pay for that (and all those engineers working on NL) when Google will do it. Another strike against NL is that Chromecast and NL don't get along well (if you're playing something via CC, you can't distribute it via NL). Why confuse customers? Get rid of NL and everyone will be happy with GVA/CC.
However, corporate plans don't always match what customer want. Enough customers said NO to Google so B&O had to pivot. With all the recent Chromecast problems, maybe (I'm optimistic) they've learned that putting all their eggs in the Chromecast basket isn't a great long term strategy as you're at the mercy of a vendor who doesn't necessarily care whether their choices ruin your business. Now, they're bringing back Spotify (see Balance and Level) and dumping TuneIn because who needs it when you've had your own internet radio service for DECADES so you're no longer at the mercy of TuneIn to keep popular stations on their platform. One question, though, is when (if) the Balance/Level get NL, will they be able to play TuneIn sourced from older devices, and will older devices be able to "Join" B&O Radio?
So, it is a mess, and it makes it difficult for those of us with existing equipment to easily add something new. I finally chose the BS1 GVA over the Level because it fit the space in my kitchen better, sounded almost as good, was cheaper and supported NL today. Every device I have supports Deezer so I can do multi-room with that (or CC + Spotify... when CC works, which lately has been very sporatic). Had the Level supported NL, I probably would not have even looked at the BS1. I just hope I don't miss Spotify too much. They seem to do better at creating playlists that can be distributed via NL, but I will give Deezer a chance (so far, the Deezer playlist I can see in the B&O app are pretty generic).