Board Thread:Naruto Discussions/@comment-26508646-20150718215129/@comment-4912646-20150719014537

Agreed, I was actually planning to bring this up once the anime provided a coloured picture of the non-cloaked form.

Most of the confusion comes from the unfortunately poorly explained databook entry. It used the cloaked form as its main image, but also included an image of the non-cloaked form, which implies both are Six Paths Sage Mode. But the entry then goes on to say that the Truth-Seeking Balls appear along with Six Paths Senjutsu, and Naruto's only appear when he activates the cloak, which would seemingly imply the non-cloaked form isn't Six Paths Sage Mode, even though it's obviously a result of Hagoromo's power. Basically, there's no right answer with the information we currently have.