Originally Posted by
jcw005
It's hard to say which gives straight up higher DPS; I don't know the numbers. That said, I will comment that increased spell speed has a side-effect that doesn't translate into straight theorycrafted numbers. Theorycrafting assumes that you're maximizing DPS by standing still, which is often not the case in endgame content. The admittedly small decreases in cast time given by spell speed, on the other hand, can be the difference between your cast finishing in time to move and otherwise having to be interrupted, which results in a significant difference in effective DPS.