What's the difference between Samma Sambuddho and Buddho Both are in the nine qualities of the Buddha but I can't see a distinctive difference.  Is there supposed to be a distinctive difference or are these qualities an example of repetition?
According to the Visuddhimagga in its description of the contemplation of the attributes of the Buddha:


  Vism. XII
  
  
  He  is  fully  enlightened  (sammásambuddha)  because  he  has  discovered (buddha) all things rightly (sammá) and by himself (sámaí).
  
  
  ...
  
  
  He is enlightened (buddha) with the knowledge that belongs to the fruit of liberation, since everything that can be known has been
  discovered (buddha) by him.
  


So the tittle Samasambuddho refers specifically to the Buddha's attainment as the result of self effort, and the title Buddho refers to the attainment itself.

Also, the term Buddho refers to any being that has seen the truth, so a Paccekabuddha is one who attains enlightenment on their own but doesn't teach, and if I'm not too mistaken an Arahat can technically be called an Anubuddha, meaning one who attains enlightnenment through following the teaching of a Sammasambuddha.