Hmm, you thought Zeke had power over Eren? Cuz he's this big bad scary monkey. Well... you thought wrong! You dare doubt our boy Eren? We saw how he grew up, we know of his motivations and aspirations. Essentially, we know his heart, we know he has integrity. But Zeke, oh Zeke. His core driving force for everything he wants, everything he planned is from his daddy issues bro, he would've been a normal person if his dad was there. With that kind of unstable foundation, there's no way he can beat Eren in making their own ideals come true.