Al ears said:
It's all in the terminology I see. Perhaps 're-equilised' rather than remastered, which most are not.
No, re-equalising is a specific process which you may or may not consider doing as part of a re-mastering project (typically you would). It's not improbable for CDs, HD downloads and LPs of the same album to be created from completely different master of the same mix. (Sometimes they're different mixes as well, but I don't want to confuse you further.) Buy a song as part of a compilation album and likely it will have been re-mastered again so its dynamic range and tonal balance fit in with the rest of the album, and may sound different to the same song you bought as a single or on its original album. In music, it's very very common for there to be considerably more than 'one version of the truth'.
If you're unsure what mastering is, feel free to google it or look on you tube, there's lots of explanations and videos for both amateur and pro producers.