wintergreen is great because it taste like minty but it's fresh and it kind of slides off your tongue
spearmint is nice it's like a watery kind of mint to it and what i mean by watery is that it kind of slips off your tongue a little bit more than the wintergreen, but don't get me confused for the spearmint and the wintergreen they're both great flavors, but one stays on your lips more than the other, while one has a sort of a sticky fresh notes that dribbles around your mouth then leaves the room like a stray cat. (which is why I think it's called the spearmint "kiss") These two flavors are very closely alike.
vanilla mint is cool too but it has a sweet taste to it, it's more for the sweet tooth person who likes vanilla candy with a hint of mint in it.
menthol moon drops is straight supermint in your mouth, not that it's exaggerated, but the mint is totally there like HELLO !!! even the bottles itself have rocks of mint in it. super minty.
I personally do love a little mix of flavors mixed in with the mint flavors but if she was an ex-menthol only smoker, then a
three piece sampler would be more obliged.
(i would suggest a three bottle sampler of wintergreen, vanilla mint*, and spearmint.
* = you can replace vanilla mint with menthol moon drops depending on how crazy of a menthol she is.)
then she can use three of them separately, and see which ones she likes, and if you get the small samplers, then a boge low resistance cartomizer will do, then she can use each of them separately on different cartomizers and label them, then one day she's going to stick to one cartomizer that has whichever flavor out of the three, (that's the more cheaper way, or you can go all out and get three Vision ego's with three different colors *she would love that*) then get a big ounce bottle of that and the vivi and BAM!