[BB] All Known Formulas

The major difference between % damage and % attack is % attack is rounded sooner than % damage, which can create a small difference.

I'd call that a minor difference, a major difference is that %wa only affects equipment. Potions and stars/bullets/arrows are ignored. So really with 200 + apples + 21%, you'll be getting 342 (%wa) and 363 (%dmg) if it's a class that doesn't have Use atk items.

It is possible BB changes this but I don't know why it would.