What is the difference between Berserk and war god? Because berserk increasez ATK and War God ATK SD but isn't that the same?
Attack speed is the rate at which you attack. A 30% increase would mean not only 30% more attacking being done but also 30% more skills being used.
Attack relates to damage and increases the damage you do with each attack by a maximum of 30%.
In general I believe most people prefer Berserk just because skills can be vital in this game and having them used at a quicker rate is more beneficial than the extra damage to each attack.