In both series, the protagonists do a job that is related to people that have recently died. They are handling their personal belongings each with their own way and sometimes helping the people who are left behind or the individuals that have lost their lives. Also in both series the protagonists have some differences, but they work well together. There are also some similar stories.
Both are episodic cases with one larger underlying case that's hinted throughout. Even though they are episodic, they aren't boring and don't drag. Plus, the characters' dynamics are kind of similar as well. Dele is more serious, better written, and the characters are more fleshed out but both are still extremely interesting and entertaining.