The relationships with ML and FL in both dramas once they come together they essentially stay together. SFL friends with ML in both dramas , working with them hoping to change the relationship by being the one at their side.
Also, in both dramas there is a SML that is antagonistic towards ML but they were childhood friends.
Both are business based dramas, one architect one fashion.
Overall feel is similar

Jang Bo Ri is an older drama but Meant to Be has a similar feel (I checked, it was from 2023)
underlying theme of someone else taking a person's position in society - swapping roles

Both these dramas have a wealthy man who gives up their woman and child for another women and money and influence. Then they end up raising someone else's child who happens to directly compete with their biological daughter.

There are similarities with the college years scenes and interactions with roommates and overall scenes
Like the four guys in Love O2O, these four guys also do computing and go on to work together as adults
Both dramas have a ML who falls first and makes the relationship happen
Both dramas are low angst and once together they stay together
The whole vibe and "surface-level" characters are similar.

younger ML with older FL - mentorship and friendship , ML supporting FL
similar industries, working together, overcoming broken relationships

Same evil villian type ex husband, who has a new woman and is ganging up with her to make his wife's life misearable in every way possible
and by same evil villian type ex, - i mean the same actor is playing the role in both shows...
he is more fun in Woman in the Veil and more serious in Second Husband, but a cheater and all round bad guy all the same...
always the husband's new woman is in the right place to know all the secrets and create havoc!
also has hidden identities...
is she blind or isn't she blind - the mother in Second Husband had that..
anyways... all the makings of this type of drama and if you enjoyed the chaos of one you would also enjoy the chaos of the other

The focus in both shows are workplace issues and specifically women in the workplace. Talented intelligent women doing their best in a world that is not so kind to them.

Younger man older woman
Busy career driven FL whose life needs healing
Kind quiet thoughtful ML who falls for her energy

Both dramas are about the love lives of three siblings. Similar themes like Adoptive parents and Marriage with individuals close to family. Also both have Extended family helping each other living in the same building. Age gap relationships / mature couple relationships. Three Bold Siblings has a bit more angst but easily managed throughout. TBS also has annoying characters but it’s beautiful or did not. Ultimately both dramas are about extended and blended families living happily together.

These dramas feel similar in the way the story is told. Both leads find themselves in each others spheres but they don’t get along. ML both drama quiet and reserved and FL problem solving justice warrior type.

Similar setup. ML is royalty and bodyguard is best friend. Bodyguard has marriage with officers daughter that gets botched. She assumes a different identify. She helps the prince while in that identity. Potential die love triangle, shaman elements highlighted. Also - Female lead has Supporters who are interesting characters living outside palace. So far though - Our Blooming Youth seems to have less comedic elements.

-supernatural ML
-special connections with FL
-first meeting bumping into each other and ML sharing a special "token"
after ep 1 , overall feeling of the two dramas , colours, warmth level etc.. are very similar.