The Essential Techniques courses are extremely detailed, tedious, and difficult. They are heavy duty, textbook style courses that only the most serious players will want to buy.
The Bending full course covers a lot of what's in this Mini-Course, plus a lot more detail about the physical aspects of bending like fingertip placement and finger angle to the fretboard.
The Bending Brushup Mini-Course is a more lightweight tour through some less detailed bending topics. There is some overlap, but the exercises are unique to this Mini-Course