@TTournier : believe me, you can easily tell the difference when the mastering is different. The first example that comes to mind is Deftones' Koi No Yokan album. The CD version sounded awful, and as I said, the guitars sounded like they were constantly frying. The high definition version was much smoother to my ears, and back then, I didn't even own a great stereo.
The same thing happened to me with Airbourne' Black Dog Barking.
Anyways, I just thought I'd ask. Thanks for the answer
As to Tidal or Spotify, I don't use those services, so I can't speak about them. I'm not sure artists can make a living with streaming services though...