It is the same story, but in Ye Chong the main couple touch each other more, they kiss from the start, and I think they also challenge each other more. They start "dating" sooner, so they have other types of fight and misunderstandings. And I don't remember if, in A Hedgehog-Like Hug, they explained about the adoptive sister / someone close to the family or if they only made her someone that the male lead used to make the female lead jealous. In Ye Chong, this adopted sister had another purpose and there were also a secondary couple and another secondary female character.
