What is the difference between these MPMediaQuery results?

Question

What is the difference in the results between these two queries:

let myQuery:MPMediaQuery = MPMediaQuery.songsQuery()
myQuery.groupingType = MPMediaGrouping.Album

and

let myQuery:MPMediaQuery = MPMediaQuery.albumsQuery()

Answer 1

As of 6th version, XCode has brilliant playgrounds functionality. Consider following code in Playground:

let myQuery1:MPMediaQuery = MPMediaQuery.songsQuery()
myQuery1.groupingType = MPMediaGrouping.Album

let myQuery2:MPMediaQuery = MPMediaQuery.albumsQuery()

myQuery1 == myQuery2

The latter comparison resolves to "true", which means, that both above queries are effectively identical.

Playground screenshot