Baek Jong Won runs both these shows and there are crossovers that are starting to happen as of June 2020 where Mr Baek sends them out to help some of the Alley restaurants.
Same two leads paired together yet in another drama of a completely different genre. They have great chemistry in both shows and I think each bring out the other's acting strengths because they are comfortable with each other.
They Both are both shows that have some medical scenario intertwined in the story. Both are very complex rom-com's on top of that. You'll fall in love with Jo In Sung as the male lead just as much as you fall in love with either of the leads in Jealousy Incarnate. It just happens to be that Gong Hyo Jin is the female lead and is perfect in both. If you haven't watched this, drop everything and watch it.