In the 20th century classical music took what I refer to as an atonal turn, while others may refer to it by other names, perhaps twelve tone.
Usually I wouldn't downgrade a disk in the ratings merely because of my taste in the genre. Here, however, I was expecting what I usually think of as Christmas music, namely pleasant melodies, but those weren't to be found in these two disks. The first disk was alright, though I wouldn't choose it. The second was less approachable both to me and to my wife, who usually has more of a taste for 20th century classical music but who asked me to stop the second disk.
The choir and recorded sound are too good to rate the disk any lower than 3 stars, but for me it is in the discard pile.
Those who like such composers as Shostakovch and Stravinsky (or Schoenborn, Webern and Alban Berg, to go further) might very well find these disks very much to their liking. Many of the pieces are not atonal, though I'd still consider them avant garde as Christmas music. Those who are looking for melodic Christmas music are better off looking at alternatives.