The Kyuubi is 1 tail stronger than the 8-tails.
Who knows.....That's as far in depth as they go with the Bijuu. It's power is measured by how many tails it has. There is no numerical value to make sense of it.
SIG AND AVA BY JAIDEN
umm, i think the point of the thread before it became distorted was the question: why do they want tailed beasts if they can be beaten so easily?" and the answer is a confusing one. Honestly in some cases it just dosent make sense. Sure the two tails got paired up with two almost invincible beings, however they didnt even have a scratch on them. And from the looks of it, she had pretty awesome control over her bijuu. I guess its just the difference in battle factors most notably inteligence.