First, some basics:
In classical music, a Composer will write a Work.
This work is then performed by Artists, which can be Conductors, Ensembles, and/or Soloists.
If this performance is recorded, that's what we call a Recording.
When a recording is published, it is usually published in the form of an Album.
Now here's the interesting part: The same recording can be published as part of several different albums, which is why we differentiate between the two.