Many say football, some say basketball. I say football is harder because the skill set involved, involves the use of your head, shoulders, chest, knees, and feet. That's my general view.

Honestly depends what position. A CB in football vs a bench warmer in basketball? Different convo. But peak level both are ridiculously hard.
Basketball is way harder imo. The footwork, the shooting mechanics, playing both ends every possession... football you get stretches where you can switch off. Different beasts though tbf.
Nah football harder no debate. Try controlling a ball with your feet at full sprint while someone's trying to break your ankles. Basketball you literally use your hands lol