Well, it depends on various factors. Itadori has raw power and determination, but Mahito is cunning and has powerful cursed techniques. So, it's not straightforward to say who's stronger.
In the manga, their strength is relative. Sometimes Itadori has the upper hand, and at other times, Mahito shows his dominance. It really depends on the specific situation and their strategic use of abilities.
Chapter 435, "A Skilled Housewife Can't Cook Without Rice", is the clearest early answer because the violence around Yu Li becomes final instead of hypothetical. A useful checkpoint is the way the scene starts with The elderly dean looked at Zhao Lang with a tinge of regret.
Chapter 629, "The Family is Going to be Gone", is the clearest early answer because it turns Bai Lu's situation into a concrete plot event. A useful checkpoint is the way the scene starts with Even after training under Jiang Li for so long, they couldn't...
Chapter 291, "To Hell with Sister Complex!", is the clearest early answer because it turns Wen Jiaojiao's situation into a concrete plot event. A useful checkpoint is the way the scene starts with Early in the morning, Jiang Li's hospital room door was knocked.
Chapter 427, "Wearing Slippers onto the Stage", is the clearest early answer because it turns Wen Feifei's situation into a concrete plot event. Early on, He was eager to break free, but Jiang Shixu, the skinny little guy,....
Chapter 545, "Kiss Me", is the clearest early answer because it turns Bai Lu's situation into a concrete plot event. A useful checkpoint is the way the scene starts with Truth or dare, I still choose dare!" He just didn't believe it, Jiang...
Chapter 420, "Who Says the Attacker Can't Attack the Attacker?", is the clearest early answer because the buildup finally cashes out in a real clash. A useful checkpoint is the way the scene starts with After choosing to defend, Guan Xiong quickly made a decision.
Chapter 581, "Where is everyone? Where have they all gone?!", is the clearest early answer because it turns Luo Xuan's situation into a concrete plot event. The chapter gives readers a real answer by opening on Inside the tent, no one felt like sleeping.
Chapter 440, "You Know Fengshui Array?!", is the clearest early answer because it turns Jiang Yan's situation into a concrete plot event.
Chapter 625, "An Anonymous Corpse Found in the Wilderness?!", is the clearest early answer because it turns Wilderness's situation into a concrete plot event. A useful checkpoint is the way the scene starts with After several days of storms, Dragon Ridge Island finally welcomed a...
Chapter 351, "Miss Jin Zhen Liu Suqing", is the clearest early answer because it turns Jiang Li's situation into a concrete plot event. A useful checkpoint is the way the scene starts with Jiang Yan: "....." How does someone manage to praise themselves with...