When using your phone to stream …….is the phone a cause for any compression……and thank you for the reply
Spotify Premium uses 320kbps AAC format...fine enough for a vehicle as you lose fidelity anyway due to the nature of driving on noisy roads and vehicle noise.
If you're looking for HD (such as lossless FLAC) be aware that HD can use10x to 1000x the amount of data compared to standard, so make sure you have an unlimited/robust cell plan or download. To get lossless/HD, you'd have to subscribe to one of the HD services like Spotify HD, Amazon Music HD, and Google Play Music...but you have to pay extra for these. Deezer and Qobuz are naturally HD FLAC lossless, but I'm not familiar with their libraries. Apple has very high bitrate, but not HD yet....it is coming as a premium upgrade like the aforementioned services. And as
@MoreOvalteenPlz mentioned, they have spatial audio and Dolby Atmos for capable outputs as do most of the other HD streaming services...again, nothing you'd actually hear in an average vehicle...the road noise kills the high-fidelity.
Headsets or HIFI systems benefit the most with HD service - most premium services offering 320kbps is fine for most automotive systems, unless you have a very expensive custom system and a literally ton of sound shielding.
No matter which service you choose, it'll be
lightyears ahead of Sirius/XM sound.
Frankly, it comes down to what you want for content too...some streaming services are exclusive to certain artists, or if they do carry your favorite artist, a certain album by that artist may be exclusive to another service and not available.
Spotify supposedly has the largest library (80 millionish songs), but take that with a grain of salt...that includes your grandmother's long lost sister's brother's cousin's recordings too which might amount to a couple of million!! Lol!
Best thing, in my opinion, is to try it yourself. Each service has it's pros and cons, so use the trial periods so you can test drive them.
Only you can determine what is best for your ears.
Good luck!