An example of 2 similar shapes with different rockers: the 8'8" Gong Eternity left, a speed machine, and the 8'11" Gong Cutter right, a control freak. The flatter rocker was exhilarating by its speed and long carving gouges, but the rockered board was the one I brought for my Hossegor trip in case of big (for me: double overhead max) conditions for safety, especially in chop: hitting chop on a face full speed with a flatter rocker can be challenging. More pics at
www.gong-galaxy.com/forum/viewtopic.php?f=5&t=4048&p=61343
Flatter rockers, and volume in tails help a lot taking off in weak waves.