I mean that's cool. I'd love to hear your points. You were the guy who did the AI battle thing right?
It'd be cool to see what happens with chapter 8 added in, but I believe it changed a lot tbh. Also I did mention multiple times that the Gates were responsible for the more flashy stuff from both Jack and the Thunderfaller.
But overall I still believe the Thunderfaller is a lot stronger than the PoMA MC after this fight and Chapter 8 in general. Before the fight, when you go to Rin and Jin's trials, Jack summons the meteor in the Entertainment District without the Gate. It does say that his Aura is being spent, but after he summons it, the MC says it's an acre wide and was falling from beyond the clouds. Also after the Archon disperses the meteor Jack is not winded or tired at all, meaning that it's not an all out ult or anything.
If you consider that the Thunderfaller survives a direct impact from that thing before even knowing that there is a gate there, it's safe to say he's a lot more durable than the Wu Heir since we haven't been shown anything that would point to the contrary. I know the Jade Dragon is a cheat mode, but I'll mention that with it on, the Thunderfaller takes literally zero damage from that and the ground breaks without their Aura or body breaking.
As said before, the Yang Bohai slap is probably the greatest durability feat we've seen from the Wu Heir, and it's wanked into oblivion. There is no way the slap was even half a percent of his power, and in general I'd say the slap is just a holdover from earlier versions where Niki allowed crazier stuff to happen when the MC had cheat mode on.
Strength and speed wise I'd say it's closer but maxed Thunderfaller still takes this. During the strength trial if you make it to the end it says that the weight you are carrying is so great that every step leaves shoe imprints in the stone floor. If we assume a standard male shoe size and both feet on the ground then the weight would have to be close to 172 tonnes for something like this to happen if the imprint is only 5cm. Half that if we consider that the stone deforms only step by step. And the Thunderfaller carries that around the whole arena after doing that with lesser weights 10 times.
Speed wise it's harder to tell but at the Rabbit trial, getting first place requires you to run so fast that air resistance becomes a big problem and the air condenses around you. And the Thunderfaller does that for 5+ minutes straight. The speed required for air to begin condense in such a way is mach 0.3 which is a third of the speed of sound in a sustained 5+ minute sprint. If we consider that the Gate is stated to double the Thunderfaller's power though and take above the speed of sound as a descriptor, the speed at the end of the Rabbit trial is 500km/h give or take which is half the speed of sound of sustained speed.
For poisons and regeneration, I'll have to give it to the Heir, because we just don't have a lot for AC. Though in the Dragon trial, you can meet a guy who uses a technique to slash yours and his throat and freezes both of you in place, waiting for you to bleed out so he can take your power. You can beat him, and for that you have to bleed from your throat for 3+ minutes while not being able to do anything, and you are fine afterwards when you rest. With the Jade Dragon Foundation, the Thunderfaller just laughs and literally says that he can't die from blood loss, like all dragons (lol).
Dao wise, the Wu Heir definitely takes versatility, but that's only if you consider potential. Because currently, the Wu Heir is a dummy and not using multiple Dao. This will be probably corrected next update on the LB route. Otherwise, some styles like the Sacred Chi combined with 2 elements give the AC mc a lot of versatility as well.
Currently there's just no evidence besides potential that the Wu Heir can beat them without the Devil, and even then the Devil is hard to scale because in PoMa stats make no goddamn sense balance wise.