it would be absolutely necessary to debate or at least discuss subjective opinions as that would be necessary to correlate objective changes to subjective impressions.
There is a mountain of scholarly research dedicated to the effort to correlate subjective opinions with certain audio objective measurements. The short answer is in certain instances general correlations have been found but these have little predictive power on a personal basis. In other words, you might find that 70% of those surveyed prefer x but does that mean you or I will prefer x? Not with any certainty. Ultimately, it's always a personal decision and no one can tell you what you will prefer with any certainty.