Q: Is it Makrooh Tanzihi or Tahrimi to remove the white or grey hair from the beard? Is the rule for the beard and the hair is the same?
A: To cut the beard before one fist is not permissible. Obviously, this white hair will be from the one fist, hence it will not be correct.
The rule for the hair of the head is that all the hair should be even. To cut off some and leave some is not permissible.
And Allah Ta’ala (الله تعالى) knows best.