What is worse hitting a brick or pairing? (Razz)

[ceegee]

And why?
Here is three examples:

Example 1:
You have A 2 (7) and hit an Ace on 4th while villan is showing 2 8

Example 2:
You have A 2 (7) and you hit a K while villan is showing 2 9

Example 3:
You have A 2 (7) and hit a (7) while opponent shows 2 K

What would you do in each situation?