Let's not forget that there are different styles within the same styles. What I mean is that depending on the teacher's understanding and attitude (amongst other factors) you can certainly have several different styles of Shaolin Kempo, Kosho Ryu Kempo, Parker Kenpo, etc.
For instance, I teach Kosho Ryu Kempo. You will not find my teachings to be identical to other Kosho teachers. Some teachers focus more on sword work, others healing arts, etc. I tend to lean more towards the spiritual side of the arts and teach my students to live more ethical and peaceful lives - true self-defense, as we call it. Some teachers teach more of the destructive arts at their schools. Sure, I teach the martial arts side of Kosho. However, the lessons you get from my dojo are not always the same as other Kosho teachers. I tend to focus on different things and my students seem to appreciate it.
Just my thoughts.
With respect,
John Evans