I know. Naruto's only possesses Six Paths power when he draws on the power of the Biju to utilize Six Paths sage mode and Sasuke's only source of Six Paths power is his Rinnegan.Actually they have rikudou chakra but in a different way. Sasuke's possesses rikudou chakra in his dojutsu,while naruto's body possesses rikudou chakra when he's in his rsm mode.
No such power applies to their base forms.