A duplicate entry of the Reaper of Souls Collector's Edition soundtrack with slightly different formatting (smart quotes in "Gideon’s Row"). The same twenty-two tracks of Malthael's apocalypse — from "Reaper of Souls" to "A Mortal Heart" — representing Diablo III's darkest musical chapter.
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The difference between this and the other listing is purely in the metadata. The music is identical — Westmarch's gothic grandeur, the otherworldly linguistics of "Sehyen Ehvis" and "Y'Anu Gujava," the devastating boss encounter of "Urzael."
If you're choosing between the two entries, they're the same soundtrack. The Collector's Edition treatment gives you the complete Act V score, which is the definitive way to experience Reaper of Souls' music.