Its a romantic drama, both drama have ex partners appearing. Both ML are China's top tier actors, some mischievousness will happen E.g Brother adding "Married" based on the requirement to work at the Law Firm, Playing a game with your high school crush without him knowing then pretend to have issues with a purifier to get his attention ha!
Both rom-coms are slice of life with main characters as lawyers. In Love Is Sweet, both main leads are lawyers who knew each other since school whereas in She and her perfect husband, the FL is lawyer and ML works in finance who get strung together by a contractual relationship and eventually helping each other fall for one another. Both dramas have different feel to them but the underlying concept is similar.