[Cecily]

SoS = 100% haste, 100% dps.
VoG = 98% with epic +2% dps from Atk. 100% dps.
VoG = 99% with 41% + 2% dps from Atk. 101% dps.

Going off that, VoG is better to use if you have a 41% item. Otherwise the two should be about equal.