Hyper Cell Skid has higher RG (2.52 vs 2.48), higher Diff (0.056 vs. 0.054) and a lower Intermediate Diff (0.018 vs. 0.024). While I can't speak on behalf of how the coverstock strengths relate, the cores would indicate a bit more midlane and overall motion from the Dream while the Hyper Cell Skid would provide a little more downlane pop and direction change.