Kindaichi Shonen no Jikenbo (1995)

Both are about a high school student solving mysteries. Both are very similar................................

Has many episodes with similar settings; stuck in a villa during snowstorm with a murderer lurking among the visitors

Both are famous mystery series based on two of most famous Detective manga...............................................................

Both are detective shows that you can think with.

when the first time i saw trick The Files of Young Kindaichi came into my mind the same style and both of them old dramas

Both about high school turned detectives, with female sidekick. Both protagonists don't quite want to do it, but end up persuaded by the girl because of their abilities.