So the ML suffers with insomnia in both and ask the FL for company.

Identical looking actresses both into Male lead
Switch identities.

ML is boss of FL
Leads know each other from childhood but only the male leads remember that

ML with psychological issue
FL works for ML who is rich
FL is sweet ,outgoing while ML isnt
FL helps ML in healing process

Astro members including our cutee cha eun woo is present in both

Short lovely dramas

The similarities lie in --- Takes place in high school
Popular male lead
Female lead dresss as a guy

The similarity lies in the
Very simple cute leads
working busy male lead
The love after marriage genre

To put it simply the similarity is in

the love after marriage genre

The similarities:
1.Cute female lead
2.Contract /arranged marriage
3.Love after marriage

The similarities:
Simple ,beautiful and bright female lead

Quick marriage contract/arranged

Love after marriage

Its is the Thai remake of Goong with nice scenaries,landscapes and ofcourse since the remake was made in 2017 more bright and clear videos

The similarities:
The arranged marriage
In both the dramas female leads not very interested or thought about this marriage but in goong male lead is strongly against the marriage
Slow process of falling in love after marriage ,living together