I'm a little confused here.
Two international airports seeem to belong to Seoul. There's Kimpo Int'l (GMP) and Incheon Int'l airport (ICN), which is mentioned more often here in the forum.
I would really want to know what are the differences between both airports? Do they handle the same amount of traffic/airlines? Which one is better from your own prespective? Which one is Asiana's or Korean Air's hub? Are they far away from the city? And from each other? Is it just like Tokyo with Narita and Haneda?
If anyone can please answer some or all of these questions, it would be really appreciated.
Thanks in advanced and happy new year.