What difference do the shape of rails on a surfboard make to how the board performs?

Question

ie, the difference between, low, med-low, boxy raols etc.

Also, what difference does bottom shape make?

eg vee, concave, single to double concave, bonza bottom, channels, etc...

Answer 1

Check the link I posted for everything you need to know (for the most part) about board design / shape.

Answer 2

there are so many differences in board designs and dementions out there, if you want a faster board  you want a little less rocker on the rails... if you want a high performance board get more shape into the bottom of the board