STFU. You can't just decide who is the strongest by looking at which enemies they've defeated. So what if Kratos killed gods? They were simply weak! We need to look at both characters abilities. You all saw Advent Children, right? Sephiroth can cut through meters of concrete. That's fucking sick! And his reflexes are insane, that man can parry and avoid anything. He has awesome magic and he can FLY.
Kratos too :)
No. He can glide through the air, but he can't fly.