the end result is the same. The total power applied to the coil as a result of the calculations of volts and resistance.
But to boil it all down.
variable voltage - You set the desired voltage applied to the coil to achieve the desired
vape.
-- As the battery voltage drops, the actual applied power drops and you have to keep bumping up the voltage to compensate. Some prefer this level of control
variable wattage - You set the desired wattage (power) applied to the coild to achieve the desired vape.
-- As the battery voltage drops, the MVP2 will AUTOMATICALLY adjust the voltage required to apply your desired wattage so you get a clean consistent vape through the life of the battery.
Many people prefer variable wattage because of this "hands off" approach. Letting the chip in the
mod decide the required voltage for your particular resistance. That way you don't have to do the math and keep checking your
batteries base voltage every several draws.
Hope this helps.
--Crit