[mexihiperboreo]

in which other cases, the ninja was a shadow from who ever controled them, isn't much difference from a comon criminal, except for his highly training, but in these era there are too many trained criminals.

samurai other wise, is japan warrior for excelence.
highly trained, honor code (non violated), social example, good maners, a samurai until the day he die. he has his part on military history.

in simple words:
-ninja==criminal, cowardy
-samurai==example man, non fear