I love the Therionized Orff track, but I feel the ending spoils it. In the original it suddenly gets much heavier, what the entire track has been building up to, but in the Therion one, I feel it lets it down. There are no guitars and the orchestral parts are less inspired also. The rest is great though. You can see a video of the Trans-Siberian Orchestra's live performance of their interpretation of the piece, and it is perhaps not as good as Therion's but if I recall correctly they did the ending more justice.