Following up, I did some tests with the .008 multiplier set in the ini and tested some various Vcores. Again idle = Vc at idle, min = lowest recorded Vc checked after Sandra2005 CPU bench checked against SpeedFan.
BIOS setting = 1.2875V
BIOS reading = 1.304V
Idle = 1.34(SF) : 1.34(MBM)
Min = 1.30(SF) : 1.28(MBM)
BIOS setting = 1.3375V
BIOS reading = 1.344-1.352
Idle = 1.39(SF) : 1.39(MBM)
Min = 1.34(SF) : 1.32(MBM)
BIOS setting = 1.3875V
BIOS reading = 1.392-1.400
Idle = 1.44(SF) : 1.44(MBM)
Min = 1.37(SF) : 1.37(MBM)
BIOS setting = 1.4375V
BIOS reading = 1.432-1.440
Idle = 1.49(SF) : 1.49(MBM)
Min = 1.40(SF) : 1.40(MBM)
At the lower Vc's it read .02V off of SpeedFan which is pretty good in my book. It could very well just be the fact that they poll at different intervals or one has a priority. I have no idea what the set poll rate is for SpeedFan, but I had MBM set for 1 sec. intervals.
In any event, it's close enough for me to not worry about it