To conclude one practice is better than another in my opinion would be a travesty and, thankfully, that was not the purpose of your essay. If any practice is of benefit to the practitioner in leading a good and exemplary life, then that practice is obviously the best for him or her. I have always found when concluding such an essay it is best to leave any such decision as to the efficacy of a particular practice over another up to the reader. An objective, impartial and nonjudgmental summary of your findings is generally the most effective.