The Magic Librarities

I just recently received a bunch of Worldwake cards from a seller. They feel a lot like the waxed backs of alt 4th, and feel very different from a normal card. The Zendikar cards that I received from the same seller are fine. Anyone have S-Chinese WW cards to compare?

I only have a set of Raging Ravines but they feel completely normal to me. However since I only have one play set in S-Chinese from WWK I can't be sure. What seller was it? I have had really good luck with Visualmall on ebay for my Chinese cards.