i have always wondered this... what is the main difference between them.. i am using a vv/vw
device? also can anyone recommend decent vv/vw settings for them?
It's called sweet spot, to find your sweet spot.
Set your vw at 4 or 5 watts, now go to your vv settings at the lowest setting, take a draw and go a bit up till you think it's fine, now you can start with the vw setting, just the same as vv setting and again till you say it's all fine, you should be set
There are more ways, everyone do have its own way.
1.5 ohm, the coil will get more hot and faster hot then a 2.0 ohm coil, but your battery will be empty faster with a 1.5 ohm coil.
Just try it, but mostly there will be not really a huge difference between it, with a vv/vw battery you can always bring it to your sweet spot.