How to choose the right practitioner

Trust your intuition

I would suggest that you don't get cought into trying to understand and compare all possible variations of Reiki as there isn't any proof that one is superior to the other.

Trust your intuition, just go with a practitioner you have a good connection with.

Very likely you will share with the practitioner some personal information about your past and your emotional state so I would suggest choosing a person you find it easy to communicate with.

From an energetic point of view as well, you might feel more strongly the energy coming from one practitioner than another.