Music reproduction is better when there is more dynamic range, it sounds more life-like.
But dynamic range is only one quality of good sound.
Another problem sometimes found with remasters is subtle corrupting of the timing of the sounds (sometimes called "smearing"). Nowadays, equipment reviewers use the term "PRaT" - Pace, Rhythm and Timing - to describe this aspect of music, and the term is very applicable to different masterings as well. (When a recording makes you want to tap your feet, or get up and dance, it has good PRaT.)
A classic example is the first MCA remasters of the Jimi Hendrix albums on CD in 1993. Some particular processing that was used, that significantly reduced the PRaT, relative to the previous 1987 Reprise label CDs. The cymbals or vocals may be clearer or have more detail, but I'd much rather listen to the earlier Reprise CDs.
This is just one example how Dynamic Range is a good thing to have, but it is not an automatic indication of better sound quality.
When you buy a car, you don't just look at horsepower, and you don't just look at gas mileage. You also have to like how the car handles on corners, what it looks like, how comfortable the seats are, and so forth.
There is no one measurement that automatically means quality.
