It's not necessary for the basis of comparison to always align with the same theme, tag, or genre. People can choose any basis for comparison according to their preferences. For example, if the same actor has worked in two different dramas that have nothing in common, one can still ask which project of this actor they preferred.
There's no need for people to be upset if someone expresses their curiosity or opinion by comparing two such dramas. It's not a crime to do so.
The original poster hasn't criticized either drama; even if they had, it's within their rights to have personal likes and dislikes, just like everyone else. It's only justified to be upset if someone tries to impose their likes and dislikes on others; otherwise, it's not.
The essence of the original poster's question is to understand which drama, has provided more satisfaction and enjoyment to an individual.