The only realy difference that i can see that it says is the price and the voltages, the Vengeance needing 1.5V and XMS3 needing 1.65V.
Will needing more voltage mean the modules will be better or what?
Is there a difference in the quality of build between these two kits?
I will be looking to use either these kits with an Intel 3570k.
Will one kit have an advantage over the other when using with an Ivy Bridge or even Sandy Bridge?
A module that can operate at a given speed with less power is the better module. This is a general rule of thumb. The Vengeance is considered the better memory than the XMS. You should use the 1.5V memory because that is what Ivy and Sandy bridge are specced to use.