Coral Gables vs Deerfield Beach area

I'm heading to Miami for medical reasons for several months. Could be treated in Coral Gables or Deerfield Beach. I have a sense of how expensive each is, but I don't know what it's like to live in either place. Any descriptions of general vibe, safety, local amenities would be helpful. I doubt I'll get out for fun much, but I hope to have a peaceful, pleasant enough visit (under the circumstances). Thank you.