-VID is the stock vcore.
-Vdroop is the drop in vcore between idle and load whereas Vdrop is the drop in vcore between what you have set in BIOS and what you are actually getting.
-Software is notoriously inaccurate for reading vcore. The latest version of CPUz seems to be descent though. But the best way to find out is to take a digital multimeter and measure vcore directly on the MB.
-stock vcore for G0 is the VID value you see listed on coretemp, it varies from chip to chip.