Samurai VS Ninja who would win?

A great debate that has been posed for literally centuries who would win? The Ninja are born and bred assassins whose roots go back to the ancient art of invisibility. Trained in several weapons to include throwing stars, knives, chained blades and of course the Ninja Sword. The problem with the Ninja sword is that its very light made for quick moves and stealth kills however it cannot take blunt force trauma very long. Trained in Judo and other varies varieties of martial arts this warrior is deadly even without the blade. The Samurai a group of warriors born and bred for WAR. Wearing incredible armor and carrying the best sword ever invented the Samurai sword. This weapon differs from the ninja blade brother in that its Heavy folded carbon steel made from mostly Damascus, this suprisingly light for density blade that can cut a English broadsword in half makes it the greatest Sword of all time. The samurai train in sword fighting all day long. The best swordsman around that we know of.

Here's the problem I think they could both win given certain circumstances. The Ninja could win with a suprise attack or just kill you in your sleep, however the Samurai could win if it was just strait forward combat Sword to Sword. You decide who has the best chance.. Leave comments and who you would choose?