It's almost the same in terms of the details I guess. Just worthy to note that this setting affects the Voltage levels the board gives under load.
I'll have to double check but it seemed to have 0.025V of variance from what you set in the BIOS under load. So 1.45 in the BIOS equates to 1.42ish under load in Windows.
I don't know what else is changed under each setting though.