Soshite Daremo Inakunatta and Jukkakukan no Satsujin feel similar because there’s a shared “Agatha Christie” structure: a limited cast, an isolated situation, and a steady breakdown of order as fear and suspicion take over.
both are agatha christie adaptions with the same detective. pretty good, but although 'the mirror' is not as dark as this one its still pretty good. so yeah, recommend.
both are novel adaptations, both involve people dying, both mystery, both pretty good. although they differ in different areas, they do share some similarities so yeah