How exactly the damage depends from attack/defend ratio?

[Stepsongrapes]

Originally Posted by Keneth

I don't think attack and defense are actual bonuses to damage and resistance, to my understanding they form a ratio (your creature's attack vs. the target's defense) which determines a percentile bonus (or penalty) to damage.

I'm not sure if you're responding to my post, but your point is exactly what I was trying to say (with the exception that I don't think the ratio matters, per se, just the delta):

"Each point of difference between attack and defense grants a 3.3% boost to damage."

Perhaps I should have clarified that each point that attack exceeds defense grants a 3.3% damage bonus. If defense exceeds attack, then it is a 3.3% damage penalty.