Yeah, the texture is likely a big part of it. I sure hope that the fact that I bend over backwards to hunt up epic cork pieces plays into the snakes' usage too -- they might be showing appreciation for my efforts.
I have and use plastic hides from both Neodesha and Reptile Basics, and know what you're taking about but have not noticed any preference for the former. The Neodeshas are higher than the RBs, though, so that might weigh against their preferability.
Paper towel rolls are often a big hit for smaller snakes, and cardboard packing tubes (like those that florescent lamps get shipped in) for larger snakes. These are better for species that we keep on the dryer side, though, since they degrade once they get damp.