Both main characters uses a unique way to solve crime. They get on other co-detectives' nerves but in the end they have a huge role in catching the criminal.
The stories themselves are not particularly similar, but the overall vibe and feel of both dramas is. Both stories involve absurdist humor/outlandish situations and a heavy focus on fashion. Kuragehime is definitely more heartfelt while Wanko is pure comedy, but both are uproarious fun.