Stacking question

[buddahcjcc]

Do

Brute (Orc)
You are an especially large and hulking individual, and when you strike, you aim to deliver the maximum amount of pain. When you score a critical hit you add (but not multiply in the case of a confirmed critical hit) an amount of damage equal to your weapon's critical modifier
from: Orcs of Golarion

and

Killer
You deal additional damage equal to your weapon’s critical hit modifier when you score a successful critical hit with a weapon; this additional damage is added to the final total, and is not multiplied by the critical hit multiple itself. This extra damage is a trait bonus.

stack?
Can you get the benefits from both?

[Tarantula]

They are both trait bonuses. They do not stack.

The same that reactionary(+2 init) (combat trait) and warrior of old(+2 init) (elven race trait) cannot stack.

[buddahcjcc]

Ok thanks