Ida Rolf, during my advanced training, straightened up from the treatment table and sighed, “There’s nothing new under the sun of manipulation.”
All of these techniques have been invented time out of mind, again, and again, and again. All the techniques of yoga, physiotherapy, exercise, and diet that one sees out there are cycling around for the umpteenth time.
Myofascial Release (MFR) is a branded technique sourced from John Barnes, PT,, but the techniques they teach have been around forever. Ida Rolf called hers Structural Integration (others called it ‘rolfing’), but readily admitted that the specific techniques derived from many sources, including yoga and osteopathy. Myofascial release is also used as a generic, and I would be hard put to it to differentiate myofascial release in general from the vague and fungible slow deep tissue as a generic. Ditto for a number of other techniques and modalities. You are putting your hands in tissue and dissolving neuromuscular tension, anhydrous areas, and possibly some kind of fascial densification. Any road up.
On top of that, there are more differences among individual practitioners than there are among the many approaches to manual interventions. I would rather go to a good, experienced, awake practitioner from any given modality than a neophyte, dogmatic, blindered practitioner of the ‘best’ technique.
So my best answer is to find the busiest person with the best reputation in town, and go to them regardless of how they name what they do.