im not exaclty a saskue fan, im more of a naruto fan but i can understand why saskue is what he is. and why naruto is what he is, im not sure if this is too deep of an analyzation of saskue and naruto but...
saskue at a young age witnessed his clan get massacred. he never wants that to happen again. so he pushes people that are close to him, away
naruto, a jinjuriki was alone and hated it. when he grew up, he drew more and more people in towards him.
so basically, they are opposites.