✔ 最佳答案
1. Air China is better than Korean Air.
Korean Air was once known as the one of the worst airlines for safety record in the world during 1990s (another is China Airlines).
Although Korean Air's safety record has dramatically improved over years, unorthodox incidents still occurred, such as landing on a taxiway instead of a runway:
https://www.youtube.com/watch?v=76r_7MdGcLw
2. Every airline is pretty much the same in economy.