all are 90 underfoot. domains are soft, symmetrical with 0 camber underfoot and early rise. recoils are stiff, slightly more directional, some camber underfoot with tip and tail early rise. iron maidens depends on the years. the most recent ones (2012-2013) are the same as the recoils. the 2011-2012 are the revivals, which are basically the recoils with 0 camber. i havent heard about next year, but they are bringing the recoil back, so an iron maiden would most likely be like the revival
soft, symmetrical jibby ski: domain
stiffer directional ski with no camber: revival
stiffer directional ski with camber: recoil
from what ive heard, a lot of people werent satisfied with the revivals, which is why they made the recoil, so i would get the domain or recoil, depending on which fits your style more