This will be more specifically 'release' or album oriented metadata than the echonest, which is far broader in scope and whose own metadata is more track orient

This will be more specifically 'release' or album oriented metadata than the echonest, which is far broader in scope and whose own metadata is more track oriented. Arguably, being album oriented goes against the trend in the world of the 99p download. But there still exist niches where album orientation is important.