At this point, Sasuke could kill Naruto. (This point being, the Chuunin arc) He's faster than Naruto, smarter than Naruto, adapts better than Naruto (Not just because of the Sharingan either), and is more level-headed than Naruto.
spoiler!!!!!
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in the manga naruto and saskue fight and kakshi stops them in the midle but naruto is stronger because
of resengn that is more powerful then chidori and sas will lose to gar and naruto will defete gar the point is naruto is stringer than sasuke!