Well that's the thing. They are very inconsistent with their durability in DB. Sometimes they can tank planet busting, sometimes a rock that Krillin throws will hurt.
I'm not so sure Goku could survive the initial explosion itself. Frieza himself held back as he was worried he'd get caught in the blast. Granted he isn't as strong as Goku, but he's still pretty damn powerful.
Also Kratos does have one way he can have the edge with speed. In GOW III he has the Boots of Hermes, which offers travel at near instant speeds from a place as infinitely big as the Underworld (likely at least FTL travel).