Both have pretty much unending strength, though I would say, this is would be the one case where Hulk's inconsistant up and down strength as opposed to Superman, who is nearly constantly the 'strongest one there is', and climbs higher at will, would prove to make Hulk a much more dangerous threat because in WWH, he was just a beast the entire conflict. Rather than just manning up to do a simple task and reverting back to 'regular' strength levels.
But as for the battle itself, while this Hulk certainly has the strength to do the job- Superman still has too many other abilities to account for, and while we've seen Superman knocked by brutes, those are often for story purposes - we've witnessed Superman's incredible combat speed and certainly hand speed[catching fists, bullets or any projectiles from many trajetorys at once] too many times, to believe that fighting at his optimum by forum rules, that Hulk would land the neccisary blows to down the Kryptonian.
Hulk is still a one trick pony at the end of the day, leaving the ball entirely in Superman's court..