Shuangsheng Lingtan

Both have supernatural elements, a good mix of action and mystery, unpredictable and powerful plot twists. Sibling love plays a big role in both stories and can be very touching. 

Both are plot-driven and suspenceful. The MCs are encountering unexpected situations at every turn. Both forshadow an evil mastermind manipulating people and events in the stories. While solving immediate mysteries, the MCs are gradually approaching the truth about the bigger scheme and about themselves. 

Both series have suspenseful and gripping plot. Both start with a mysterious case, unfold with supernatural elements, a bit of horror, and unexpected drama. Both series have duel MCs, a beautiful cast and good animation.  

Both have tightly written plot full of twists and turns. Both stories begin with a supernatural event. Both have individual arcs that are linked together, leading up to the revelation of a larger mystery. MC are intelligent and observant.  

These anime are about a guy, who solves some supernatural cases and are helpful for the local police. The appearance and thinking of both protagonists is similar as well. Both stories are divided into two parts. First part is about the cases and the second part is about the protagonist's unclear past, to which they want to find a key. 

If you enjoy the psychological detective/thriller Death Note and love the mysteries and touch of supernatural you will enjoy Shuangsheng Lingtan. Both series move at a fast speed and contain detailed conspiracies.  

They are both mysteries and psych type genre. The difference is this is a detective case where as Ghost hunt is a more of a spiritual/ghost searching detective. Besides from the same creepy vibes and similar genre type, everything else is different. 

Both are Chinese animated series about a young male dude with a special ability that makes him especially capable of solving crimes. Both have some pretty fun fight animation too! 

In the biggest sense, these are only related through the feeling of mystery and a lost loved one, more specifically, a sibling. If you're interested in a good mystery these both are pretty decent. Lingtan kind of goes into a deeper supernatural realm that turns scientific whereas Sakurako is straight up forensics and even debunks anything not possible by science.