You seem to be stating a general rule when this concerns only a very small amount of cases (not the loudness war itself, but when the vinyl uses a different and drastically better master) that's also quite dependent on genre.

And omit that a lot of music sounds a lot worse on vinyl due to its lack of dynamic range and poor LF capabilities (classical, electronic). This isn't for nothing that the first recording pressed on CD was a rendition of the Alpensinfonie.