I agree these are potentially interesting distinctions (particularly Anthology vs Compilation) but from what I can tell none of our metadata sources make this distinction, unfortunately.
Is this something you guys have seen elsewhere? Are there are any sources we might be able to use to populate this data automatically?
If this is a something you’re looking to enter manually using Tags is probably the way to go for now, but we need to be able to automatically populate this data if we’re going to make a change here.