All these movements are the same

[Sal Canzonieri]

the same movement taught to different people with varied backrounds and experiences will then develop and evolve into different methodolgies/systems/tactics. Whatis intersting is seeing the source, and then the separate evolutions of the individual styles. Witness Fukien/Hakka styles, White Crane/Southern Mantis/Wing Chun/Ngo Cho etc.

Exactly! that's how there is evolution in CMA occurs.
Eventually they look different enough on the surface that people can't see how they are once of the same origin.