Kawasaki Ninja 650R to Ninja ER-6f and ER-6n

Are you looking for Kawasaki ninja 650R? Kawasaki ER-6f? or Kawasaki Er-6n?, well guys let see together, people who want to try 600cc motorcycles class from Kawasaki will get more than one choice from Kawasaki, as we know Kawasaki has ready with Ninja ZX-6R, Kawasaki ER-6F and ER-6n series, but is it the same class? or it's only different on design? As I know, Kawasaki ninja 650r is not full