1. They both took the serum that leveled them up to 5.
2. True, Gillibrand does have fire which is a counter but it doesn't do you much good if you can't utilise it.
3. If anything I don't give enough importance to the feeding, why do you think our apostles/origin keep pushing us to feed to get stronger? Ella's the spawn of the third, which we are also a spawn of/or at least have their power as well as the fourth, there is absolutely no reason to believe she couldn't also do that. And I wouldn't discount her having killed a lot of people, she could just fly to the place that's having a revolutionary war going and eat corpses, and even then, there's nothing to say that eating monsters/superhumans won't give us power once we get strong enough to not have to purge theirs and instead be able to subjugate it/absorb it. Ella is ridiculously strong for how young she is, and some dude who's had 35 years to train as a level 3 could have more raw power, but there is nothing that says that he does and at least tangential evidence that says that he doesn't or he should've been able to fight it off to begin with. Or maybe her being level 5 meant she bypassed most of his innate defenses because he is not a level 5, at which point we're back to saying that he isn't powerful enough.
1. Yea, i did mention that, she got destroyed after that. And the fight before didn't exactly give us info.
3. An insane amount of assumptions and speculation going here.
3.1 Why do you think our apostles/origin keep pushing us to feed to get stronger? -
Because it will be important in the endgame somehow. How? How would i know, i just know it gives very little right now.
3.2 Ella's the spawn of the third, which we are also a spawn of/or at least have their power as well as the fourth, there is absolutely no reason to believe she couldn't also do that. -
There is a reason, she is, based on her own words, imperfect, and based on her own words again, Mc IS perfect, the power through feeding might easily be part or even the main reason why the Mc is special.
3.3 And I wouldn't discount her having killed a lot of people, she could just fly to the place that's having a revolutionary war going and eat corpses. -
True, but that would be very noticeable, for HERO and regular law officials both, thousands, tens of thousands, hundreds of thousands, or, hell, millions of bodies don't just disappear on a whim. Plus, we only know of a single civil war like event happening during the course of the game, Ella would definitely need more of them.
3.4 there's nothing to say that eating monsters/superhumans won't give us power once we get strong enough to not have to purge theirs and instead be able to subjugate it/absorb it. -
Maybe, maybe not, that's just speculation. There's nothing to say that eating monsters/superhumans WILL give us power at a later date.
3.5 Ella is ridiculously strong for how young she is, and some dude who's had 35 years to train as a level 3 could have more raw power, but there is nothing that says that he does and at least tangential evidence that says that he doesn't or he should've been able to fight it off to begin with. -
There is something to say that he might have more power.
I will note that based on the last library encounter, the lieutenants and captains spar sometimes, considering his reputation as "Physically as strong as lvl 5" and his claims of being able to beat fresh lvl 5, we can assume that he won some sparing matches against them, like against Alexis or Caballero after they lvled up.
3.6 Or maybe her being level 5 meant she bypassed most of his innate defenses because he is not a level 5, at which point we're back to saying that he isn't powerful enough. -
Your answer hinges on the rule breaking 5th evo, which is fair, but, the simple fact is that it's far more likely that Ella is simply continuing to feed the transformation, this answer doesn't force us to make any guesses based on what is possible and gives us an answer based on what we already know.