Kaidan Botan Doro: Beauty & Fear is a more expanded story about a horror folktale in Japan. Whereas in 100 Tales of Horror, it was a one-episode story.
A collection of different stories with a creepy aspect to each one. 100 Tales of Horror stories are more emotional with some being down right sweet or sad. Mysterious Summer stories are more on the macabre and reminds me of the Twilight Zone and Black Mirror. Both are a really fun watch.