Board Thread:Naruto Discussions/@comment-30881771-20170713230149/@comment-734582-20170715083455

Lorenzo.r.1st wrote: but u don't know for sure who the weakest bijuu is, nor do u know how much power they have, and how they compare to each other. Plus, it assumes that Obito's biju were at full power when they might not have been. It's mentioned their chakra was used to grow 10 000 Zetsu, and they were still bound to the statue. Also, Obito was controlling them, meaning that they may not have fought to the best of their abilities. Notice that in biju form, almost none of them use their special powers (like lava, or steam) to their fullest. In stead they mostly try to match Kurama and Hachibi in their specialty (raw power), which is kind of stupid.

Furthermore, there is an interesting trend: the more tails, the more raw power but the fewer special abilities. Kurama's only power is that he can sense negative emotions. Contrast Shukaku who is made of sand, can manipulate it into jutsu, can use his curse seals to seal away things and can manipulate magnetism to seal people or defend/attack. Plus he canonically used wind attacks.

So while the higher-numbered tails may possess more raw power, they possess fewer special abilities. So the whole " higher tails = stronger" thing may not be quite true.