•They both are emotional,realistic,big family drama.
•Lee Sang Woo takes one of the main roles in both drama, his character giving it his all for his love, unafraid of struggle to get people to accept them.
•Heavy plot for the older generation especially the grandparents.

Both drama are slice of life, family drama and have:
•Kim Hae Sook playing an important role as a mother character
•Many emotional scenes
•Familial love,relationships&parent-children issues
•LGBTQ+ characters

If you watch both of them you will understand why
I cant spoil you d*mn it! Let's just say that both drama feel very similar. Both the way they handled the plot and the way it was presented.

both drama hold the same feeling to them showing the passage of time and the importance of the relationships we create during our lives. the light in your eyes tends to be more lighthearted and fun but memory doesnt lose in terms of being heartwarming. Family plays an important role in both drama. And you will probably cry while watching them.

Both drama deal with Alzheimer's disease and its impact to the patient and their surroundings. They both focus on the emotional impact along with relationships before and after the diagnosis. While Memory focuses more on familial love, A Thousand Days' Promise deals with more romance.

Earthquakes, natural disasters, politics and the aftermath of it all. While d-day deals with the medical part of it, designated survivor deal with the politics.

Both drama deal with medical settings in extreme and dangerous situations after a natural disaster. They also have a splash of romance and some politics around the profession.

Both drama deal with:
Highschool,struggles, dreams, sports, comradeship, gender norms, growth through a common passion.

Both drama are wholesome slice of life whose main topic is dancing, human interactions and connections through dance and growth.

Both drama focus on a sick character who reunites with their past lover.
You will definitely cry watching both.

Same feeling.
Sick character finds love.
Tragedy that will tear your heart apart.
Really really emotional acting.
You will cry your eyes out.

Both drama deal with the topic of the secret identity of one of the main leads who tries his best to be with the mc despite everything. Heavy on the chemisty and flirting but where Love Better Than Immortality can be toxic, Word of Honour deals with evetything in such a subtle and responsible manner. The main similarity for me lies with the roles of Shangguan Qiu Yue and Wen Ke Xing.