Well it is definetely cleaner sounding, but the digital noise reduction they applied destroyed the highs but uneffected the lows in the frequency information in the digital stream. To Remove pops and clicks and analog noise. I would rather have the noise instead of having the music ruined.
The thing is i never noticed the difference, it is worth noting you would only notice on high end equipment which reproduces the sound exactly. I have shitty computer speakers so its all the same to me, and not the best hearing in the world. If this person did not do the sonogram test i would have never known, unlike say rock albums that are destroyed through the so called Loudness War. That is the opposite problem the lows are crushed in favor of the highs and mid range freq.