Short answer: Yes.
Long answer: They work very differently than from what happens during guild arena/battle arena/colo than during quest. The major difference is, the attack boost is not static, but it needs to proc before it takes effect. I might be mistaken about this, but ALL units gets a boost in their next attack, not just those outlined in the card description. Also, the skill level has no effect on how much it boost, but on how often it procs.