I pick Wonder Woman to win.
This is a General Rule of thumb that also works in the real world. All things being equal, if both opponents are similar in strength (meaning each one can cause damage to the other). It’s always the more skilled opponent that will win.
World War Hulk is massively strong and durable but not much else. I cannot see any possible way Hulk could even lay a hand on Wonder Woman Much less land any incapacitating or disabling blow and forget about BFR since she can fly. In all honesty, Wonder Woman would not even need super speed to avoid WWhulks attacks. She can do it with pure fighting skill.
Even superman had trouble landing punches on Wonder Woman during their fight in Wonder Woman #219(Wonder Woman dodged all superman’s attacks after the initial punch and landed all her counters)
Wonder Woman was born for these types of battles it’s one of her most important claims to fame as a warrior and AMAZON who routinely and purposefully train to defeat opponets who are considered stronger than themselves. Wonder Woman has done just that plenty of times.
The day Wonder Woman or any WARRIOR class superheroes loses to LESS SKILLED being because they simply had a raw power advantage (strength) is the day she/they ceases to be Wonder Woman/warrior. Wonder Woman does not lose battles like this ever.
From Achilles to Bruce Lee speed and skill always trumps raw power.
How Woman Wonder Wins?
Off the top of my head, since Wonder Woman’s sword is capable of cutting beings like Superman, Wonder Woman’s sword can easily cut off WWHulks limbs completely incapacitating him without actually killing him due to hulks regenerative abilities. She can rinse and repeat as needed. She stays in character and her conscience is clean since she did not have to kill him. This is a way Wonder Woman can easily use one of WWHulks greatest strengths.... regeneration. against him.
Wonder Woman cans easily BRB WWHulk with her flight capabilities or her lasso.
Hulks raw power advantage may not even be an issue since Wonder Woman could simply remove her Bracelets and gain access to all her natural power which by all accounts is much higher than superman’s base strength level. But like I said above she does not need it to beat WWHulk
How can WWHulk Win?
WWhulk would need to outsmart and out fight Wonder Woman in-order to get in a position to BFR, Incapacitate or knockout Wonder Woman, which should prove physically impossible given Wonder Woman’s abilities and speed. Even if hulk manages to tag Wonder Woman he is still not strong enough to ONE shot her. He would need to literally out fight her which is highly unlikely.
Unless WWhulk has some other abilities or powers other than raw strength Stamina and regeneration, he would lose every time to someone like Wonder Woman.