Interesting conclusion. It's debatable whether anyone can hear the difference between bit perfect output, or not as happens with the Amazon app. In truth, I'm not sure I can hear the difference between W10 resampling, or direct; or between Tidal or Amazon; but for the fact that the Amazon app is simply deceiving is enough for me to not use it. I'd rather my £££ go to Tidal tbh if they sound the same. One thing is sure, if an app is streaming direct then you can have some confidence that the presentation is more accurate, even if you don't like the experience!When Amazon launched the HD tier I spent a 3 month free trial doing A-B comparisons with Tidal Masters and some fairly resolving headphones. Amazon has slightly better sound quality but the terrible interface made me keep Tidal. I'm a Prime customer and have been for almost 12 years so I'm already in the Amazon ecosystem.