It's also on Amazon MP3. According to their page for the album, it was released on Amazon the same day you posted about it being on Spotify.
https://www.amazon.com/Eccentric-feat-Floor-Jansen-Remastered/dp/B07ZWDYWPX/
It's on Apple Music, as well.
https://music.apple.com/us/album/eccentric-feat-floor-jansen-remastered/1486137893
It seems to be a digital-only release, from what I can find. And that was *all* I could find; even my usual haunts, like Discogs, AllMusic and Metal Archives don't have it listed.
Based on what little we know, it seems like a fairly obvious cash-grab to me.
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(Sorry I'm late to the party here. I only just saw the new compilation when I opened my languishing Spotify app today.)