Supes picks up the Hulk, lifts him up into space and let's him die in the vacuum (or sends him spinning into the sun.) The End.
But if Hulk whips out a shard of Kryptonite from his torn jeans pocket, then Supes in for a mighty whoopin'...
-Hulk doesnt need to breathe in space anymore (see WWH PROLOGUE ).
- Hulk thrown into the sun will make him absorb gamma radiation in such a high concentration that he might become a being of cosmic power level (We might see this at the end of WWH actually,rumors of the Hulk being thrown into the sun by the Sentry are all over the net.))
So, no Supes wouldnt beat Hulk that way.