As strong as the so6p was, i thing naruto when all said and done will be stronger.
reason: the sage said on his death bed "I don't have long any more. Shukaku, Matatabi, Isobu, Son Gokū, Kokuō,
Saiken, Chōmei, Gyūki, Kurama. Even though you have been separated, you shall always be together...