Complex sentence: There are some superficial similarities between "The Munsters" and "Addams Family" in that both were shows with a gothic look that featured families of horror-movie characters incongruent with their mainstream suburban communities, the two shows were quite different in tone and characterization.
Split into simpler sentences: There are some superficial similarities between "The Munsters" and "Addams Family" in that both were shows with a Gothic look that featured families of horror-movie characters incongruent with their mainstream suburban communities. However, the two shows were quite different in tone and characterization.