Board Thread:Naruto Discussions/@comment-24098614-20140910222248/@comment-25093611-20140927093730

@rachin

and this is the sole reason, if you understand the underdog-thing than you should also understand why naruto is always shown weaker and inferior to sasuke, it isnt sasukes fault, the plot/kishi created them as rivals and i wonder if you can find any serious story with rivals where the rival of the MC wasnt stronger than the MC himself o_O

i didnt find any...

btw, we dont know how they trained but i think it was equal :P but why was naruto not growing as fast as sasuke?

because of the underdog-thing, and the in-story answer was because sasuke is a genius and naruto isnt -_-

pretty easy right? :/