I can't answer your question but I have to comment on your musical taste. I have the same Porcupine Tree album and Vavaldi. My favorite recording of Four Seasons is the one I have done by the Ancient Musical Society. So I will have to check out this Andromeda. I have often wondered if others like me who enjoy some Prog rock also get into some classical music. Now I know there is at least two of us and I'm not totally alone. I have found that I am a big fan of the Baroque period.
I still listen to my vinyl and don't have duplicates on cd. I find it interesting that you would buy the same thing on another format. Please come back and let us know how they compare. So far the little I have heard of 5 channel music I did not enjoy it. I'm sure that's probably what they said when stereo came in. But 5 channel music takes any realism right out of the music for me.