From Musubi press release. Whole release here "Is the paper any different? In short, yes. The new Tomoe River exhibits the following changes: It is a few microns thicker than the previous version. As a result, it is stiffer in the hand, and less crinkly than the old version. The writing experience is different. There’s no good way to describe it, but the paper feels a little drier and has more drag. Some inks show up on the new version as a slightly different colour from what you might be used