Manual therapy is a general name for hands on treatments from different fields including osteopathy, physiotherapy, chiropractic etc. This type of therapy addresses all body systems and includes diagnostic methods, assessment and unique treatment. The focus in the treatment is on the connective tissue and musculoskeletal system. Even though the techniques may differ, the approach is looking at the body as a whole.
The myofascial treatment is a general name for different treatments dealing with the function of the fascia. It's based on the realization the fascia is the most important connective part in the physiology of the body.