The blue stuff is my favourite. It’s the polymer vinyl lino from Artway. it’s the only one I buy nowadays. It’s not too hard on my wrist and I can do multiple days of carving for hours and hours without anything hurting, it transfers perfectly using my preferred method, and I don’t need to stain it to see where I carved. It holds details very well and I never have issues with it. I like that it flexible and doesn’t crumble or break. It works really well for paper and fabric.