For a while, I was seriously in the rayon camp -- it seemed better to me, since I was having a lot of difficulties getting that magical "just right amount" using organic cotton.
I've since slightly altered my views. I found that while rayon is great when it's first wicked, after a while you have to do *some* kind of fiddling to it; rinse it out, push some more in, etc. Now I tend to use my organic cotton a lot more. Maybe it's just that with time and experience, I've gotten better at wicking, I don't know. I do know that a dry hit from rayon tastes even worse than a dry hit from cotton -- hard to imagine, and maybe harder to achieve than a dry hit from cotton, but it's a very nasty chemical taste; cotton just tastes like burned cotton.
There's room in the market for both, depending on each person's tastes, experience, and tolerance for fiddling. I'm just finding organic cotton less fiddle-some, lately. I should try some of that japanese cotton I suppose, but it's so costly, I haven't found room in the
vape budget for it yet.
Andria