are you a beginner snowboarder? if so, i'm going to say none of it matters. they make too many boards covering the entire spectrum of flex/profile that you're going to drive yourself NUTS trying to decide which board is the right one for you. i would suggest a medium-flex rockered board for ease of learning.
and i guess your second statement is somewhat true. there are compromises made when going rocker or camber, stiff or noodle. if you're a beginner, again, a medium-flex rocker board will be a great start.