I think both air cushion and liquid foundation have their own advantages and applicable occasions. When choosing, you need to decide based on your skin type, needs and personal preferences.

1. Skin type: For people with dry skin, air cushions are more suitable. For people with oily skin, liquid foundation may be more suitable.

2. Demand: The air cushion can produce the effect of nude makeup, and the liquid foundation has a stronger concealing effect.

3. Sun protection effect: Air cushions usually have sun protection function, but liquid foundation does not necessarily have sun protection function.