After looking at both profiles, I think Reze winning is much, much more likely in my eyes.
Starting with the values, Yang's normal AP is
above 249.48 tons, while Reze's regular explosions scale
above 443.66 tons due to being able to blow gaping holes into characters on that same level. Reze's durability and self-detonation sit at
550 tons, with her torpedoes and explosive sparks scaling even higher than that. The torpedoes and sparks are not really minor side options either, as her torpedoes are
wide AOE explosive attacks that can gore characters around her regular explosion level, while the sparks can outright
vaporize targets around that same level. So Reze has stronger attacks that are genuinely nasty for Yang to keep taking and they can easily gore her and put her under crazy damage pressure.
This also makes Reze's durability advantage more viable considering Yang starts at
249.48 tons, while Reze
can withstand damage from her torpedoes, which are above 550 tons in potency and as I said above, can gore characters who are 443 tons of TNT. So Yang's normal hits are not going to be doing clean major damage right away and Reze would definitely be able to take the brunt of them.
This matters because Yang does not only have to damage Reze but damage her enough for Reze to even need to rely on regeneration in the first place and if Yang's normal attacks are struggling to get past Reze’s durability properly then
Yang wearing her down by forcing regeneration argument becomes a lot harder to buy unless Burn has already built up.
Yang can still take hits because of
Aura, which is basically her defense that lets her keep fighting before damage starts properly reaching her body. So Reze is not instantly blowing her apart while Aura is active. The issue is that Aura still runs out and Reze's kit is pretty much made to keep forcing damage over and over with
explosions, sparks, torpedoes, self-detonation and body bombs. Burn is Yang's main way to deal with the AP gap. If she takes enough punishment without being overwhelmed, she can throw that energy back with more force and make her own hits much more powerful. But this still means Yang has to take damage first and that damage is coming from someone who already starts stronger than her and has stronger options above her regular explosions. So Burn gives Yang a comeback path, but it does not erase how rough the early fight is for her.
Yang's heat resistance helps a bit, but I would not treat it like she resists Reze's whole offense like y'all above have been doing. Reze's explosions are not only heat as they still have blast force, pressure, AOE and AP behind them. Yang can resist
part of the attack,
but she is still spending Aura to deal with the actual explosive force. Yang's own kit is still useful though. Ember Celica gives her ranged shots, mobility from the recoil of her weapon, stronger punches and aerial movement, and her
Atlas bombs let her set up delayed explosions instead of only relying on h2h combat. She also has Analytical Prediction, which helps her read what Reze is doing and that is good against someone who fights with feints, traps and decoys.
Yang is also the better straightforward brawler and her Class G LS is a problem for Reze if Yang actually gets a proper hold, since Reze is only at least Class 100, so she is not physically overpowering Yang in a grapple. But grabbing Reze is still not a free win because Reze can explode from her body, self-detonate, turn body parts into bombs, detach parts of herself, or use propulsion to break away. So if Yang grabs her, Reze is definitely in a bad spot physically because she can rip her apart (
not even sure she can with the new LS rules), but Yang is also holding someone who can blow up in her face and drain Aura at point blank range.
Like I said earlier, the range situation is also a little weird. By the current profile wording, Yang has the better listed range since Ember Celica reaches
hundreds of meters, while Reze's explosions are listed as
tens of meters. But I personally think Reze's range section is outdated, because her actual showings look much better than that. So I would give Yang the on page range advantage, but I would not act like Reze cannot contest from a distance at all.
For Reze, her main edge is how many ways she has to make the fight worse for Yang. She can make explosions from her hands, head, body, fingers and limbs, while also using explosive sparks for ranged pressure, torpedo limbs for increased and wider damage, self-detonation for close range and body bombs to
punish those who keep upclose for too long, practically, Reze is not giving her a basic punch for punch fight since she is forcing her to deal with multiple threats at once.
The sparks are a bigger deal than just ranged spam since they are small projectiles that explode on contact and can vaporize characters around Reze's regular explosion level. Against Aura, that is especially useful because Yang has to keep spending Aura even when she is not taking a direct physical hit and even dodging them is not always simple due to the explosions creating additional AOE pressure (
like blowing up within Yangs range).
The torpedoes are arguably even worse if they land cleanly, hitting harder than her normal explosions while covering a much wider area, which means Yang cannot just keep eating them and expect Aura to hold forever. That is one of the main reasons Reze's offense feels more reliable to me, since she already has regular explosions above Yang's normal value and then follows that up with even stronger attacks that can force serious Aura loss if Yang gets caught.
Reze's
explosive propulsion is also travel speed advantage rather than a reaction or combat speed boost, so it can be used here. Her transformed speed is above
Mach 25.8, while her propulsion scales to
Mach 81.48, making it roughly a
3.16x increase as a burst movement advantage. Because of that, Reze can launch herself away, close gaps, reposition, take aerial angles, move around buildings and avoid staying exactly where Yang wants her. This matters because Yang's best chances come from controlling the fight up close, whereas Reze's propulsion makes that much harder to maintain.
On top of that, Reze's skill also helps, as she is a trained assassin who fights dirty and efficiently even in human form by disarming people, getting behind them, choking them out, using knives and targeting limbs. In Hybrid form that becomes much more advantageous since she can combine those tactics with her Hybrid abilities. Her Instinctive Action should probably be mentioned too. For example, her decoy body was able to dodge an attack from the Fox Devil despite not having a head while she was controlling another body. Because of that, she is not helpless if pressured or caught off guard
and that works very well alongside her decoys and body tricks. The decoy stuff is honestly one of her better answers to Yang's aggression. Reze is smart enough to actively build a game plan around it rather than just using it randomly, such as intentionally
make it look like Yang has landed a decisive hit, leave a headless body active as a decoy and then wait for Yang to commit before detonating it at the worst possible moment. Since Yang tends to capitalize on openings and press her advantage in close quarters, Reze can exploit that tendency by baiting her into what appears to be a winning exchange and turning it into a trap instead.
Beyond that, her regeneration is another problem
and I actually think it becomes even more troublesome when combined with her durability. Yang first has to get through Reze's higher durability enough for the damage to matter. Then, if the damage is serious enough,
like broken bones or mutilated limbs,
which are highly unlikely, Reze can regenerate from it anyway. She can recover from severe injuries, regenerate lost limbs and even come back from just her head if her pin is pulled. Hybrids can also reuse blood already inside their bodies to regenerate, so she does not need fresh blood after every single injury. Granted,
there are limits since she still depends on blood, but Yang's normal attacks are not automatically pushing Reze into a losing regeneration cycle. That is the important part, because Reze is durable enough that Yang has to work for meaningful damage and even when Yang finally gets that damage in, Reze still has regeneration as a backup.
Because of all that, I think Yang's path to victory takes more effort.
She has to survive the early pressure, build Burn, land stronger hits or bombs, and then capitalize with her CQC and lifting strength once Reze is actually being worn down. It can happen, but it requires time and the right openings.
By contrast, Reze's route feels easier to picture. She starts stronger, can keep attacking Aura with AOE, has sparks and torpedoes that are far more dangerous than simple chip damage, can heal through a lot of Yang's normal damage and has multiple ways to punish Yang for getting close. Rather than needing one perfect hit, she just has to keep forcing Yang to spend Aura until that defense starts falling apart.
With that said, both have solid ways to win.
For Yang, her best arguments are Aura, Burn, Analytical Prediction, Ember Celica, Atlas bombs, her better listed range, her CQC skill and the massive LS gap. If she survives long enough to build Burn and catches Reze properly, she can turn the fight around.
For Reze, her best arguments are the higher starting AP, better durability against Yang's normal hits, AOE pressure, explosive sparks that can vaporize characters around her regular explosion level, wide torpedo attacks that hit harder than her normal explosions, propulsion, High-Mid regeneration, Instinctive Action, decoys, body bombs, and self-detonation, with a lot of those advantages directly making Yang's usual approach harder.
My opinion: I think Yang can absolutely win if she survives long enough to build Burn, capitalize on her superior cqc skill and use her LS to force favorable exchanges. Once Burn starts stacking, the AP gap becomes much less comfortable for Reze and Yang's ability to read opponents through Analytical Prediction gives her opportunities to punish mistakes.
That said, I still think Reze has the more reliable overall route to victory. She begins the fight with the AP advantage, a notable durability advantage against Yang's base attacks, High-Mid regeneration that makes wearing her down difficult, and multiple forms of explosive pressure that can continuously drain Aura. Her sparks, torpedoes, self-detonation, body bombs, decoys and explosive mobility all make it harder for Yang to consistently force the close range fight where she performs best.
Because of that, I think Reze's advantages are easier to leverage throughout the match than Yang's
So my vote goes to Reze, mid-high difficulty, roughly 7.5/10 times.