I prefer the fabric that GC2B binders are made of. Underworks are a sort of mesh that's stiffer, and so with the half length ones (tritop) you get a bit of roll up that can be visible. I also get a bit of roadrash from my underworks one but wearing a thin t-shirt or a vest under it helps. it also helps to stop my chest slipping. I noticed the other day that they've started doing cotton lined ultimate tanks and tri-tops as well, though they're fractionally more expensive.
the GC2B ones have a cotton canvas panel at the front, and the rest is spandex, so stretchier and less stiff.
Danae are a Danish company, so if you're in Europe or the UK, the shipping times/costs might be less than from a US company like Underworks or GC2B.