I own both. I have the V2 Pro Series 3 and 7 and the QuickDraw 300 and 500 series. The difference is Quickdraw and V2 is Quickdraw comes with all 3 cartridges in their packages. Also, the QuickDraw has a longer battery life on the 300 and 500 over both V2. Also, Quickdraw doesn't make you wait...