it's the overall undeniable conclusion one scan easily see in the data - that the life has been slowly squeezed out of the music going back to at least twenty years ago.
Yes, all recordings today are using more compression when mastering, but there are two subsets of the remasters being released. All of the Pop/Rock/Hip-Hop are going to be measured way into the Red (bad) area of the DR Scale. That's the result of the Loudness Wars.
The 2nd Group of remasters is what the OP asked about; are there better quality CDs/vinyl than the original releases?
The originals will most likely measure in the Green area (Good); but do they sound good? They might have more dynamic range, but original CD SQ sucked (since we are talking about Rock music).
It's only in recent years, the remaster SQ has increased, partly due to new vinyl, also due to the premium Artists knowing they have the tools to release a better product to their fans.
These recordings will also have more compression than the early releases, but they will still not measure as Bad.
As I stated earlier, the studio remix can open up the sound and make it sound dynamic. These albums are in the minority, and great care is taken during the mastering process. Notice that the Mastering Engineer's name is now prominently written into the credits.