Board Thread:Naruto: The Last Discussion/@comment-5407586-20141206093403/@comment-945885-20141206151833

Before I resume translating the stuff about the Otsutsuki Clan, I thought people might be interested in the section about Naruto's Kurama Mode.

Kurama Chakra Mode Borrowing an enormous amount of chakra from Kurama, who has been sealed in his body, Naruto exhibits overwhelming power. By simultaneously activating Sage Mode, his sensory capabilities and the strength of his ninjutsu are significantly increased...!!

Caption: With the Four Symbols Seal lifted, his chakra flows out like flames.

So, yeah. No mention of Six Paths Sage Mode, and he's just using Kurama Chakra Mode. I unfortunately can't make out the text in the "Before" section, which might explain exactly why the seal looks different. I've personally always just assumed that it's because it's the other half of Kurama that is now sealed in him, since the design sort of looks vertically flipped, like when Minato used Chakra Mode.