Board Thread:Theories and Speculation/@comment-33953813-20180114191320/@comment-32617252-20180115032739

yes, basically. that was about as implied as something can be lol. that's exactly what it means. Naruto with outside (aka friends, bijuu, whatever) became stronger since sasuke was already stronger than him by himself. this is basically saying that a bunch of normal people> one strong guy. and a few more things, like Naruto surpassing him in the end, even their initial difference was huger.