"Soloing Without Scales" is a good "bridge" between "The 4 Note Solo" and BGU.
The combination of the "Blues Blocks" in SWS will become the "Pentatonic Boxes" introduced in BGU.
PSTM is technique oriented. It will teach you the patterns and fingerings in the Boxes, but not about how to use them when actually playing a song. The other courses address that aspect of soloing.
From the PSTM intro:
"In this course we are going to push the envelope of both your technical ability, and your ability to mentally “see” the pentatonic and blues shapes on the fretboard."