Final answer:
Schizophrenia is a mental illness characterized by hallucinations and delusions, while Alzheimer's disease affects memory, judgment, and personality.
Step-by-step explanation:
Schizophrenia is a serious mental illness characterized by the inability to differentiate between reality and imagination, inappropriate emotional responses, difficulty thinking, and problems with social situations. Hallucinations and delusions are common symptoms of schizophrenia. Treatment usually involves antipsychotic medications that work by blocking dopamine receptors. On the other hand, Alzheimer's disease is a neurodegenerative disease that affects memory, judgment, and personality. Symptoms include disruptive memory loss, confusion, difficulty planning and executing tasks, and personality changes.