Recommendations

1) Both dramas involve time travel & parallel worlds (In Alice the time travel is explained scientifically whereas in The King it is more of a fantasy)
2) Both have romance & destiny elements
3) Both of them have police involved in time travel
4) Both the main leads seek revenge for their parents death
5) Both of them have good visual effects

Similarity:
1-Both of them have serial killings in the past.
2-Both dramas are about to find the serial killers.
3- Both the main characters are cold and show their affection to only their loved once.

Difference:
1- In Flower of evil, Do hyun soo has a family and in Nobody knows, Cha young jin considers ko eun ho her family.

(If I add point 2 it would be consider as a spoiler so I won't add it. However both of these dramas are amazing. they are MUST WATCH!!!)

Both have a nice team work among the heroes
Both have a common member as vilain
Both have a very supportive and brave female lead
If you enjoyed the quest mission in The Eight ,you will like Maiden Holmes

Both have quests to complete
Both female lead are always backing up the main male
Lead
Both had a team to to work with them
Both have good martial arts action
Both have a close personality as vilain
The only difference is The Eight has a happy ending compared to Martial Universe

Posing as a School student, is really a murderer. I found both movies to have similar feels and were overall good watches.

Both of the dramas are set in the republican era with a hint of mild romance. Both drama focuses on crime-solving and how the leads build up trust and reliance with one another.

Two men who will do anything to protect each other even if they are on opposing sides. The bromance is strong in these two dramas.

Both movies show the harsh conditions of a Filipino jail. They also explore homosexual love between inmates.

Both movies are about juvenile delinquets running amuck and causing trouble.

Both are Filipino movies about a young man having a rough go in prison.

The fight between North and South Korea. The innocent young men and women life lost. The lack of communication, the royalty, the team work, the fight for country, the team work. The leadership, commanding effort. Love and respect. Duty called.

The North and South. The differences. The fun part. Human being regardless of political belief differences. The royalty, country divided by thin line. Royalty. Human dignity. Care and Love with no border.

The differences of practice, the care of individual regardless of nationality. The competition, the divide, frustration, can it be united? Holding inner feeling, live, family, country, politics,

North South Korea movie. The politic. The innocent kind people. The ugly hate people. The divide. The sharing of family love, the inner self, wanting of peace but country not in peace

This shows the romance side (or possible break up?) as well as the guy's comeback as the head of his own company. In my humble opinion this is the best of the Rich Man, Poor Woman series of dramas.

This would also be covered in the Entrepreneurial Age drama.