The Second Dimension will hook a lot and hook early, while the Reign will (depending on the lane condition) hook a little less, but will hook more in the backend. I've tried my Second Dimension at 2000, and it was just too strong from front to back for anything other than a super duper flood. I had trouble getting it to the breakpoint because it was so early. The "enhanced traction mica" in the cover (which is basically just a fancy way of saying it's a particle pearl) really accentuates this.

The Reign will not be exactly the same as a Reign of Fire even at 1000 because it's a pearl coverstock that skids more through oil and responds harder to friction. However, it will certainly make it much closer. Pearls with sanded surfaces can give you a really nice ball motion since you get the energy retention for more backend, but the ball reads the midlane more and really wants to grab the lane and hook on the backend. For me, a sanded pearl is my best option when I need to move in and open up the lanes and cover a lot of boards, while polished pearls are better for moving back right and playing more direct angles.