VDrop is the CPU voltage being lower than what you set it at. Vdroop is the voltage dropping even further when under load.
Oh I see.
How come do I get lower voltage to what I set it?
I mean 1.55V in bios, and in windows its 1.5V, bit worried I would need to set my CPU at 1.6V just to get something like 1.55V.
It's look very good so far 
and that Speedfan has been updated a few days ago that I was not aware of so my temps now should say what coretemp says as the tj is at 100 