Hi,
The difference between Ninja and Samurai are considerable; huge actually.
Samurai were of a higher warrior class, and enjoyed privilege in society.
There were two basic Ninja families. One worked for the Shogun, the other for the imperial family.
While Samurai were highly trained and skilled individual warriors, contrary to the modern politically accepted 'history' that ninja were skilled individual warriors, they were not.
One on one, (probably even multiple opponents), with bladed weapons, ninja could not stand in front of a strong Samurai warrior.
Ninjas were highly trained with regard to espionage types of practices. Poisons, assassination techniques, map making, the role of the ninja was largely to 'observe' and report. Basically, they were spies. Less than five percent of their role was combat related. Today, this is largely inaccurately reported. The official 'history' of the ninjitsu schools say that there were actually styles of 'ninjitsu.' Actually, the two main families could be considered 'styles,' but not actually so. This was a family related 'business,' and one could not simply join. Even retaining them usually was at the request of a major lord close to the Shogun or Emperor. Ninjas were kept in secret, and certainly out of any type of visible appearance or school.
Their acrobatic training was amazing. There are stories of ninja who would run out of a house only to disappear... then reappear perhaps to kill from behind. They actually had the capacity to run out of the house, grab a beam from a low roof, and do a 'giant' swing up to the roof. The people chasing would not see the swing up, and it appeared as if the ninja just disappeared.
Many traveled with/as roving bands of performers, actors etc. They might be the gardeners on a large property covertly observing and protecting their employer's house, or working for the enemy and spying. Usually no one knew who they were. Their business was basically espionage related.
The Samurai were highly skilled standup warriors. They lived by a code of honor and dignity called the Bushido code. Bushi, warrior, and 'Do' or way. So they lived by a code referred to as the 'Way of the Warrior.' During the Tokagawa Shogunate, and the six hundred years of peace under their control, Samurai were not fighting wars. So their emphasis was on 'perfecting' their fighting arts and strategy. Also, they were expected to 'cultivate' their higher spiritual, artistic and intellectual abilities.
Many Samurai were also poets, writers, fine art painters, masters of calligraphy etc. Each thing they did, each task they undertook was always with a mind of focus and precision.
They lived, trained, refined and perfected their war arts. They were the soldiers who were above board and highly visible.
In summary, the Samurai were highly skilled individual warriors facing opponents openly either individually or on the battlefield. Ninja were skilled in some individual fighting, but were not as trained in the sword or blade arts, or the jujitsu; they were not well equipped to go straight one on one with a Samurai. They did however have some tricks which could equalize the engagement, but again not in a straight up fight pitting pure fighting skill against a Samurai.
Hope this helps.
All the best,
Joel 'Chihand' W
http://chihand.comStay Connected, (Internal) 'Body Sense'