Same feels. Both about crimes, but Voice is a bit more realistic (no element of magic or time-traveling). Also, both use the same font.

I loved both for the strong bromance that they presented. In both dramas, I felt myself rooting for the guy best friends more than the actual main guy/girl relationship. Both dramas, have a nice balance between lightheartedness and addressing serious issues. Either way, it's hard to love one without loving the other!