Which scenerio is worse: the death of a parent or a parent forgetting about the existance of his or her child (due to a coma or some other cause)?

I was just reading about a lady who had been in a coma for over a decade. She recovered and remembered her two sons but forgot about the existence of her youngest, a daughter. This woman attempted to pretend to remember her, but her daughter saw through the facade. So this made we wonder….

Is a parent’s death worse than a parent forgetting about his or her child? Or is the reverse worse?