Board Thread:Wiki Discussions/@comment-24871958-20140427161249/@comment-24871958-20140427161805

Seelentau wrote: It's wrong to state that they have YR, YR or YYR at all, simply because there's no proof for that.

The proof is that they recieved one half each of the Sage of Six Paths. Sasuke is a descendant of Indra (Uchiha Clan) which recieved the Yin Half of Hogoromo. And Naruto is accepted as a distant relative to Asura (Also his Reincarnation) and the Senju Clan, and the Senju inherited the Yang half of Hogoromo.

Sasuke recieved the Yin Release and Naruto Yang Release.

Madara also stated that they both have one half each but he has both halfs and that he is hence stronger then them.