Board Thread:Naruto Discussions/@comment-25124448-20140630200132/@comment-24067511-20140704225112

I look at it like this: They are equal in strength. The Hyuuga can completely stop the flow of chakra in an Uchiha's body and, if needed, force it open. Also, a direct blow to the heart is assumed to be instantly fatal (this can also be true with the Uchiha and any jutsu they might afflict to the Hyuuga's heart tenketsu). Also, the Hyuuga can also see much farther ahead with their Byakugan than an Uchiha can with their Sharingan. And they can see the flow of chakra and the tenketsu points, whereas the Sharingan can only see the flow of chakra, not the tenketsu. And since their attacks involve forcibly injecting their victim with their chakra, their taijutsu is extremely deadly. So that is how the Hyuuga would win. However, the Uchiha do have the advantage of being able to use the Fire Release with great efficiency. And with their Sharingan, they can easily place a Hyuuga under a genjutsu. Assuming that this person means a master of the Sharingan is as seasoned with it as Itachi, the genjutsu can alter their victim's perception of time or worse. The Uchiha also get Izanami and Izanagi, to turn illusion into reality and reality into illusion and to trap their victim in a never-ending illusion that will repeat itself until they accept who they really are. Downside to that is that they go blind from using those. Now we cannot assume that an Uchiha who mastered the Sharingan will be able to use the Mangekyou Sharingan for a number of reasons. One, it is rare for one to awaken the Mangekyou Sharingan. And to assume that they also have the Eternal Mangekyou Sharingan is almost absurd since that is much more rare. However, the Sharingan alone can be enough to overpower a Hyuuga. The Uchiha would be able to read their movements and predict where they will be going to to attack and might be able to copy some of their taijutsu moves. Maybe not with as much deadly force, but enough to still injure them a good deal. And that is how an Uchiha would also win.

So I think they would be equally powerful. If you were to take 25 Hyuuga Clan members and 25 Uchiha Clan members, they would probably end up killing each other, with neither one the victor. That, or they would wear each other out to the point that the fight would never be finished.