I personally prefer the 2.4 ohm heads with my Twist. I have heard the using the low resistance heads can cause problems for the Twist but I am unsure how true that is. Really, any head can be dialed in to give the same wattage by adjusting the voltage so there is not much of a performance difference between the different heads if you are using VV. The higher resistance heads do seem to provide a warmer
vape as they heat up much more quickly but that is really the only difference I have noticed.
As for battery life, my experience has been that the higher resistance stuff requires more voltage, which drains the battery faster.