Is Nam Myoho renge kyo the same as Namu Myoho renge kyo?

Not only is context important but words have absolute meanings in themselves. Fourteens does not mean the same thing as four teens. “Fourteens always come out”, is not the same as ” four teens always come out”. “The moon shines nice” is not the same as” the moonshine’s nice”. Words are important to convey meanings. Small changes in a word’s or phrase’s structure or sound changes the entire meaning and import of the word or phrase.