Winter Wind is a reformulation of the Flint Hills Cone 5/6 Porcelain. You should not notice a difference in workability or glaze fit. The body is almost identical, but the original included a bag of talc.
average shrinkage wet to dry = 4.49%
average shrinkage at bisque = 6.85%
average shrinkage at cone 5 = 10.26%
average absorption - 6.24%