Laser skin resurfacing options in Korea - Fraxel vs Picosure vs CO2?

I am planning to get laser treatment for my overall skin texture and mild scarring in Korea. There are so many laser options and I am confused about which would be best for me. I have heard of Fraxel, Picosure, CO2 laser, and many others. Can someone explain the differences and which might be best for skin texture improvement? I have Asian skin (Fitzpatrick type IV) so I am worried about hyperpigmentation risks. Which lasers are safest for darker skin tones? Also, what is the typical downtime for each? I need to understand this before I plan my trip.