Wording on Carnage Symbiotic Serial Killer

[Ludo Chose]

Domino - Things tend to go my way : "Enemy characters do not roll additional dices for critical results in their attack or defense rolls."

Hex special condition : "The character doesn't roll additional dice for critical results during attack, defense or dodge rolls."

Carnage - Symbiotic Serial Killer : "The defending character does not add dice to its defense roll for critical results."

Because of the slightly different wording on Carnage's innate ("add dice" instead of "roll additional dice"), a friend of mine is telling me that a character targeted by Carnage doesn't count critical results as successes when defending. Can you confirm or deny this?

Thank you for your time.

[Negoldar]

The Critical results count. Like the other effects you mention Symbiotic Serial Killer denies step 8 of the attack timing chart to your opponent.