I use cotton, always have. Cotton bacon to be exact. I don't mess with my rebuildables much lately but, yeah I've always used cotton. I've read plenty of posts expounding the benefits of rayon but what's the real difference? I mean at the most essential level, is one any better than the other?
I've tried both Rayon and Cotton. For how I vape, I prefer Cotton. Muji Cotton Pads to be specific.
I find Cotton Pads are Much Easier to Work with. And while Rayon may have a Extremely Slight edge taste wise, it Isn't enough to make any Real difference. To Me.
Everyone told me a Main Reason I should use Rayon is because it Wicks Better. That I wouldn't get Dry Hits. Or at least, Not as many. But with the Watts/Airflow/e-Liquid I use, I Don't get Dry Hits with Cotton. So I see it kinda like putting VR Speed Rated Tires on a Toyota Prius. Sure, Better Tires. But Not something that I benefit from.
Maybe if I was trying to push things Harder Wattage and Chain Vaping wise I would see Rayon as a Plus?
So as other have Mentioned, the Only way to know if something works "Better" is to give it a Try and see how it works for You.