Replying to Kung fujas vs. obsethed rocker?

ok so i was flipping through the k2 brochure for this year and it said that the kung fujas have 5/30 rocker and the seths have 10/20 rocker. hmmm so this means that the rocker on the kung fujas is longer but not as tall as the rocker on the seths. meaning that the seths have more effective edge yet bigger rocker. the decision seems quite obvious to me so why would anyone pick kung fujas? and dont say theyre skinnier cuz the diff is like a cm seriously. did k2 mess up the numbers cuz seths seem way better