Actually, track #22 on the Prometheus is part of the track "In campo aperto-alternate version" (track #13) on the Cinevox release. The first 58 seconds are exactly the same as far as I can tell.
You are right.
When I compared them for the first time I felt both sounded so differently that I assumed the mix wasn't the same. But after your post I've just made a closer comparison with Cool Edit Pro and there I go.
The old Prometheus CD (which has a far inferior sound...) has just left my collection... Great!