Both male lead joined the mob
Lots of actions, some comedy,
Both are old movie.
The young male lead ended up on good side or bad side?

Both main male lead were raised by mob or gangster
After they grown up they were asked to do all the dirty work for the gangster
How they resurface, to get clean?

Both make lead were trained and grew up with terrible gangster.
What will they do after grew up?
Will they become bad gangster and kill people?
Will they have inner conscience?
Will they take revenge?

Both main lead were trained by gang leader.
They were both at their lowest point, after training, they were asked to be policemen, as a mold or spy…

Same male lead in this two historical Korean drama
Both drama he played the role of layman, and eventually started to have feeling with the princess

When I read eyes color change, immediately I remember this Japanese movie.
The eye color changed indicate some supernatural power is going to happen

Both male lead were the high rank general in ancient time.
Both were time traveling Korean drama.
Both has a legend main lead.
Both are romantic, not separable couple over long journey and generation

Both were popular Korean time travel drama.
Both male lead has lots of action fighting scenes.
Both has romance

Both were popular time travel Korean drama
Both male lead were king or high rank general in ancient time.
Same female lead played on both drama

Both are time travel.
The male lead went in and out
Plots can be confusing as heck.
Some romance, some action, kind of mystery

Both drama are time travel.
Both has romance, Korean popular actors and actresses
Both has action triller plot.

Both are time traveler. Back and forth. Could be confusing.
Can be interesting if did right,
Science, robot, time capsule etc