Kratos is the main character of Sony's God of War series, and widely considered to be one of the mascots of the Playstation. The Greek god of pure strength, Kratos is filled with rage and fury, most of his actions driven purely by revenge. While many of the gods he kills are not exactly nice themselves, Kratos is an infamous figure among the deities for his questionable sense of morality, and the sheer scale of his killings against them. By the time of God of War 4, Kratos has taken up home in ancient Norway as a much more somber, reserved figure, haunted by and resistant to his past, and doing his best to shield his son Atreus from them and learning what it takes to be a god, a father, and a man.
I'm not a hardcore fan of the original God of War trilogy, so GOW 4 came out of nowhere for me. Even with all that said, I have nothing but respect for TC's portrayal of Kratos. TC's Kratos is a ROTTEN apple, and his performance is downright ferocious, instantly commanding the scene the second he even speaks. I'm actually a little disappointed he was recast in 4 so we couldn't get to see him handle such a polar opposite version of Kratos - just look to his Mace Windu for him going wiser and more controlled. But, since it's a new beginning for the series, I understand the new direction and have nothing bad to say about Christopher's performance at all. The flashes of anger we see from him in are especially striking because Kratos spends so much of the game as someone whose rage is much more internalized. But Christopher also perfectly handles Kratos as a much more poignant, fatherly figure who, despite his status as a god and mass murderer, ultimately wants nothing more than to be human.
I don't think either is outright better than the other. Kratos is lucky to have been gifted with two fantastic actors for two different stages in his life, and nobody could've done a better job at that than TC and Chris. They've both earned the right to say that Kratos is a role that has defined their VO careers.