Never skied the domain, but from what I know, the domain are fully rockered ski and the suspect and cambered ski.
That been said, If you are more a jump guy, the suspect would be better then the domain. The suspect are a really good ski all over the mountain, people hate on Salomon because they had some durability issue 3 years ago or so. K2 are bombproof tought, still have my PE from back then.
Do you prefer a ski with or without rocker? I don't know which one are softer but on the top of my head I would say the domain are softer