If Naruto were Kratos' son in a fanfiction, the story could go in many directions. Naruto might have a different view on power. Instead of seeking recognition like he did in the original story, he could be more focused on using his power to right wrongs in a more forceful way. His relationships would also change. For example, his bond with Sasuke could be more of a rivalry based on power, similar to how Kratos has his own rivalries. And his training would be a combination of ninja training and whatever training Kratos would give his son, which might involve more physical and mental endurance challenges.
His powers would be much more physically dominant. He might not rely so much on ninjutsu but more on brute strength like Kratos. He could have the ability to rip his enemies apart instead of using shadow clones.
Kratos is incredibly powerful, but it's hard to say if he's the absolute strongest. Different fictional universes have their own mightiest characters, and it depends on various factors like their powers, skills, and the context of their stories.
The story of Kratos is complex and compelling. He was once a servant of the Greek gods but was betrayed and wronged, leading him on a violent path. As the series progresses, he grapples with his actions and tries to find a way to atone for his sins.
Kratos' height in comics varies depending on the artist's interpretation. But generally, he's depicted as quite imposing and towering over most characters.