I've watched the K-drama twice, so I remember the details clearly. Here's my analysis. I enjoyed this adaptation, despite some minor changes. Firstly, the youngest son in the K-version was born to the same parents as the older siblings. In the C-version, the father remarries (his new wife leaves him and their baby early on), resulting in the youngest son having different mothers than his siblings. His friend/boss in the C-version is revealed to be his younger half-brother. The cousin in the K-version is married with a child studying in the Philippines (I think), but in the C-version, she's divorced because her husband had debts and ran away - we never see him. In the K-version, the sister gives birth to a child (after the father's death) while the doctor sibling is expecting. In the C-version, the doctor already has a child, and his father names him and is present for a short time after meeting his grandson - there's no hint about anyone else being pregnant.
I am writing this right after completing, so I might have missed on other details, so please feel free to reply below.
I am writing this right after completing, so I might have missed on other details, so please feel free to reply below.