Different story here... It's pricier than muji. To me, rayon absorb slower than muji, last longer... Seems so because it is not as easy to be burnt.
Taste... I like muji better... Rayon to me maybe have pure taste but it is on lighter side... With muji the taste felt more intense.
The most cons for me is the built... With rayon, it is still very hard to me to gauge how much do you need because you need to jam more rayon to the coil compared to cotton. Otherwise it will be loose... It also felt more slippery...
When wicking a thin coil like ni200 with 30 awg, it became very hard as you try to put more and give pressure to the coil and make it deformed.
Cotton bacon is quite good but not too far different with muji.