From the CirqueFAQ:
[4.5.3] Are Mystère and Mystère (Live) different?
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Before the Cirque du Soleil Musique releases in 2005, little
confusion existed between these two titles; however, after
the CDS Musique releases, one title was dropped — “Mystère”
— and the other renamed — “Mystère Live” to “Mystère” —
but the latter is still the live recording.
To help clarify: In 1994, RCA/Victor released the studio
recording of the production Mystère, entitled “Mystère.”
Two years later (in 1996), RCA/Victor released a live
compliation of the show it entitled “Mystère Live.” While
both albums were distributed under the RCA/Victor and
BMG/Cirque du Soleil Musique alliances, the original
studio (1994) album was not selected for distribution
under the Cirque du Soleil Musique label (created in 2004).
Instead, Cirque du Soleil chose to rename “Mystère Live”
to simply “Mystère” and change the album artwork.
The studio recording featuring musical compliations by
René Dupéré from the original debut of Mystère is no longer
in production or available in the Cirque du Soleil Musique
catalog.