Missha Misa bb cream No.21or No.23, which is better? How big is the difference?

Just the difference in color, one is more suitable for yellowish skin and the other is suitable for people with whiter skin.

You can choose according to your skin color. I have used three missha, which is very useful.

However, it will turn black after rubbing with silver ornaments recently, indicating that it contains heavy metals, so I stopped using it.

I suggest you don't rely too much on bb cream.