I've done some, really there are subtle differences in a file from the same mix in a lossless vs lossy, but sure, you can't notice it if you're not really payin

I've done some, really there are subtle differences in a file from the same mix in a lossless vs lossy, but sure, you can't notice it if you're not really paying close attention. But Spotify problem is not the use of lossy 320kpbs compression, they're probably not using good source material or just upscaling 128/192 to 320. Their quality is worse than a pure lossless stream properly compressed to 320.