Assuming the use of a common external DAC and redbook format, a CD player is just a streamer with a local source for the digital file. Streamers are the same, with their data source being remote. The primary differences come down to clocks (on the streamer or DAC depending on medium), DAC’s and clean power. The combination and quality of those components on a streamer or a CD player will determine the quality of sound that you hear.
Music through streamer vs CD/SACD
I wonder what method is used by the platforms to upload music to the cloud, I imagine something simple like a digital ripper or hard drive on a PC. For this reason, I consider it useless to rate the sound quality if you have high-end equipment. I think that listening to an SACD on a +$15k player to compare with a streamer of the same price range, there will be a noticeable difference. What do the experts here think?