Three ways to rig a sail
(1) to exact specs
(2) so it looks how I think it should look
(3) so it feels just right
Normally I try number 1 and number 2, and find number 3 is right in the middle

BTW h2o: not that I have that much experience on them but I found the Maui wavesails felt better to me (as a heavyweight mind you) on a more constant curve RDM (Ezzy) which flattened out the mid section and twisted off a bit more, and also used at the top of their wind range