In both dramas, FL enter a different world and both have awesome cooking skills. There is love triangle in both dramas. The love triangle was little less annoying in TLWOTG (2022).

I think both dramas are similar in few aspects:
1. FL has terminal illness
2. ML and FL have a contract in the beginning but fall in love later on.
3. ML is supportive of FL, when learns about the illness
4. The ending is also similar - Being Positive

They are both are similar as ML and FL relationship starts with fake/contract marriage and then turns into love. Also, ex-girlfriend comes back to sabotage their relationship.
Perfect and Casual is better as tits plot was better than Cute Programmer, but that's my opinion.

Both gave me the similar vibes....in both main leads are in college. One of them is bit shy in revealing their relationship in the beginning because of parents' while other main lead's family is open minded. One of their acquaintances causes misunderstanding between the main leads. In both the series, there is one common friend who knows about their relationship (in DBK its female friend but in TT its a male friend). At the end, its one main leads who clears the misunderstanding by his tactics. In both, the main leads have awesome chemistry. Both are worth watching

Both have a few similarities -
* Both have love triangle.
* Both have two royal bloods
* Conspiracies
But the ending of Hwarang is much better that KIL. The FL of KIL is better than FL in Hwarang. The comic aspect is more in Hwarang. That's what I felt.

The vibe is similar. FL wanted by everyone. She loves someone else in the beginning but later on falls in love with ML.

- School life to college life
- FL proposes first.
- ML loves FL but doesn't accept openly
- ML is super smart

In both the drama, FL initially try to kill the main hero but fall in love later on. Both have lots sweet and comic moments between ML and FL.