The poachers are pretty stiff for a park ski but they have a healthy amount of rocker so buttering them isnt as hard as the flex would suggest. They are also pretty heavy as well. Not sure how they compare to soul riders though. I would read the roofbox review for the poachers and see how they compare.
https://www.newschoolers.com/news/read/The-Roofbox-Reviews-K2-Poacher