ejr1953:
In a related vein, have compared a number of (same recording) CDs with SACDs and found that the latter are normally louder and more compressed. Have often wondered if Sony did this as a standard mastering technique in order to prove the superiority of the format; listeners often assume that louder feeds sound higher in quality.
Have also compared DSD feeds with 24/96 PCM ones and cannot tell any difference with my ears. A very helpful CD/BluRay in this regard is the LSO/Davis recording of the Nielsen symphonies that contains the original recording (24/192 PCM and DSD) in DSD, Flac, 24/96 PCM, CD, and MP3 formats. Was done several years ago and, so, does not include MQA. A great way to make up your own mind and on your own system about the various file formats.