This was a pretty good debate, so I want to personally congratulate both Existere and Abhil for doing a good job making their case. I like to rant and talk a bit, so excuse me if my vote isn't brief enough. 😛
Now, Cable vs. Wonder Woman is an intriguing match because both these characters could not be more different than one another for their respective Mid-Herald Tiers. This match is made all the more interesting because you have two debaters who know their shit when it comes to each character.
One thing that I liked from Existere's posts is that he was able to show me the level of precision and control Cable had. Multitasking and the like while dealing with arguably one of - if not the - top high herald in Marvel in the form of ol' Norrin Radd. Being able to fight, even in the form of an ultimately losing battle against the Surfer, is a good feat. Being able to do that while performing everything else at the same Cable was doing is pretty absurd, all things considered. Considering that in this fight, Cable has no need to split his attention while fighting Wonder Woman, that's a strong advantage I personally don't think Abhil properly countered or deconstructed here.
On the other hand, Abhil made a strong case concerning the sheer raw physical might of Diana, who's a solid level below the likes of Superman and able to give him and other "elites" a strong physical fight. He was definitely capable of bringing some points to light such as Cable's default durability outside of his shields. Should Diana breach them, I'd confident Nate wouldn't be able to endure a full powered punch from the Amazon.
But could she breach them to begin with?
This is ultimately something I wasn't convinced with utmost certainty. Given time, I'm positive she could, but Existere made a lot of strong points showing that Cable wouldn't give her that time. Cable's versatility and ability to do a laundry list of things at once while fighting an opponent was a point that Abhil dismissed, but didn't outright counter, imo. Granted, levitating a massive landmass and repairing structures and reading minds of the planet doesn't matter in terms of this fight as there's no reason for him to even attempt those things, but the fact that Cable was able to do those things while during a fight leads me to believe that should he focus all of his effort on his opponent as he would here, things would simply look progressively bad for Diana.
I certainly don't think Cable would have an easy time besting Wonder Woman, but Existere proved to me that he'd eventually overwhelm Diana with a multitude of different options where as Diana is limited in comparison. Ultimately, I have to give him the vote. Tough, tough match up. 👆 to the both of you.