My streamer will stream directly, so usually just do that. While I am an Apple guy, casting has a higher bitrate over Airplay.
IMHO, doing it direct sounds better. It also allows me to move around my house without any music dropping.
Apple Music streaming vs "direct" connection
With all the streaming options these days, Anyone play around with different configurations to stream Apple Music while staying in their ecosystem?
Iphone>Apple Music>Airplay>Airport Express> amp. (may not be true lossless per Darko article)
Ipad>Apple Music> Apple headphone adaptor>amp (Ipad outputs 24/48, headphone adaptor dac does 24/48 - or so they say)
Any other configurations?