The possible reason you can’t tell the difference because majority of DSD512 filed are upsampled. I said it few times, the upsampling adds nothing but noise to the original file.
@soix
The good thing is, we have a choice. We can choose to be content with what we getting through Qobuz / Tidal or buy DSD downloads. I always appreciated the option to buy the music, one is philosophical and other reason being able to hear the music as intended by artist or studio engineer.
In my system, native DSD files do sound much superior to their streaming counterparts. They aren’t cheap but man, the dynamics and realism is off the charts.