I'm comparing an old cassette copy of Eric Johnson's Ah Via Musicom and the streaming version available online (with CD album art and presumably from that release too), and I've noticed that every track on the cassette version is a half-step higher in pitch than the CD version.
For example, "Cliffs of Dover", according to the Wikipedia article, was recorded in G major, and that's what the CD/streaming version uses, but the cassette version is in A-flat major.
It sounds like both versions of the track came from the same master, but the tape version was just sped up to raise the pitch.
I've never heard of anything like this being done for any other album, and I can't think of a good reason for the change. The album isn't long enough for runtime to be a concern, for example.