Board Thread:Theories and Speculation/@comment-734582-20150712141917/@comment-4912646-20150712214714

A few things...
 * We don't know for sure whether Hagoromo only had the Yang power and Hamura only had the Yin power. It's possible they both had both powers, or that Hagoromo had both and just shared the Yin power with Hamura. After all, Hagoromo is supposed to represent the perfect balance of Yin and Yang, unlike his sons.
 * As far as we know, Hamura becoming the Ten-Tails' jinchūriki was never even a possibility. For whatever reason the Rinnegan has a special connection with the Ten-Tails, since it's required to summon its body and perform the Six Paths Ten-Tails Coffin Seal.
 * Supposedly Hamura did awaken the Tenseigan, since it's said his eye(s) form the core of the Tenseigan altar. Though nobody seems to know for sure where that information comes from.