This was posted by fright88 on another thread. I think it does a good job of explaining the difference.
"Here is my simple explination. Right now I am vaping a mod at 6v ith a 3 ohm carto. using this calculator
Ohm's Law Calculator
I find that I am vaping at 12 watts.
Now what Variable Wattage does is you set the watt you want to vape at and it automatically adjusts the voltage to give me the watts I wanted. So lets say I have it set at 12 watts (something the beta units can't do but I am hoping) and I put on a 1.5 ohm atty or carto the kick should adjust the voltage to 4.24264 which is the voltage needed to get 12 watts out of a 1.5 ohm carto per the calculator. If I then put on a 3.5 ohm carto it would adjust the voltage to 6.48074volts.
Now the big difference between VW and VV is lets say on my VV PV I normally vape at 6v with 3 ohm cartos but I decide I want to try a new 1.5 ohm atty that I just got in the mail. If I throw that 1.5 ohm atty on my VVPV and don't adjust the voltage I am likely to blow the atty and am not likely to like the vape even if it doesn't blow because I normally like 12 watts (3ohm at 6v) and 1.5 ohm at 6v is 24 watts. However if I did the same thing on my Kicked mod or a Darwin I wouldn't have to fiddle with anything because the electronics know I want 12 watts and will automatically adjust to my desired vape."
"Here is my simple explination. Right now I am vaping a mod at 6v ith a 3 ohm carto. using this calculator
Ohm's Law Calculator
I find that I am vaping at 12 watts.
Now what Variable Wattage does is you set the watt you want to vape at and it automatically adjusts the voltage to give me the watts I wanted. So lets say I have it set at 12 watts (something the beta units can't do but I am hoping) and I put on a 1.5 ohm atty or carto the kick should adjust the voltage to 4.24264 which is the voltage needed to get 12 watts out of a 1.5 ohm carto per the calculator. If I then put on a 3.5 ohm carto it would adjust the voltage to 6.48074volts.
Now the big difference between VW and VV is lets say on my VV PV I normally vape at 6v with 3 ohm cartos but I decide I want to try a new 1.5 ohm atty that I just got in the mail. If I throw that 1.5 ohm atty on my VVPV and don't adjust the voltage I am likely to blow the atty and am not likely to like the vape even if it doesn't blow because I normally like 12 watts (3ohm at 6v) and 1.5 ohm at 6v is 24 watts. However if I did the same thing on my Kicked mod or a Darwin I wouldn't have to fiddle with anything because the electronics know I want 12 watts and will automatically adjust to my desired vape."

