We have listened to all four on cd. They all sound like Faust of the old days, mixtures of oddly repetitive beats, weirdness, effects and talking and beautiful tunes.
Of the four, the one by Jean-Hervé Péron is the most avant garde. The one by Gunther Wüsthoff seems the most tuneful and accessible. But all four are great.
No doubt they are available in the usual places and are highly recommended, especially if you were a fan in the olden days. Vinyl versions are limited.