Iris (2009)

They are similar in the "secret" spy like stuff.. Both are full of action and suspense.

Both Korean drama has really intense action spy, war, intelligent, action, drama , romance genre.
Both involve the fights between North and South.

A-list acting. Romance, Love, strong character, perseverance, beauty, support, help, sweet, mystery, unique

There are good fighting scenes, lots of SFX and a very interesting soundtrack for both dramas. In terms of plot, they might not have all that much similar, but in terms of cool effects and explosive scenes... they might. IRIS might be more action-oriented, Red Swan seems to have some side-plots too.

Theres is subplot in Eyes of Dawn about government spys. There are also a lot of action scenes and explosives. Both also feature foriegn locations.

Athena is a spin off from Iris. They are very similar with a different cast and a slightly different story. The action, suspense and romance are as amazing as in Iris.

Both main leads in both drama enrolled in a military like training, subsequently involved in secret mission. Both were in love but will it possible for them to be together forever?