Samurai are generally solo fighters and fights with them are usually over within a minute or so. They are fairly heavily armored and are almost always equipped with a katana. They are about an honorable and quick fight.
Vikings are group warriors with some level of skill, light armor, and a larger array of weaponry. They have teamwork and will usually go for overwhelming power over planned strikes. Having larger weapons, more strength, and setups that can use smaller weapons and shields... they are fairly balanced fighters.
I prefer that balance over biding my time and waiting for that one critical blow.
Well, while Vikings have brute force andwill.....I must go with Samurais. Their weapons are professionally crafted to chop of a head in one slice, and the dedicate their entire lives to martial arts, not just plunder. In a 1V1 fight of a standard Viking and standad Samurai, the Samurai would win. But who knows, it can still go both ways