Kas'im is superior as a swordmaster here without a doubt. His technical mastery over the saber, proclaimed skills, all surpass what Vrook is deemed to be via pretty narrow showings and many presumptions. There is a disparity in the Force between them, but I don't see where would Vrook find a chance to utilize it against a superior combatant.
Still, Kas'im has shown immense ingenuity to be honest, so I think he can somehow figure out a way to fail and die.