Let's be honest, Part one Sasuke easily outclasses part one Naruto
Note, this isn't a troll, fanboy or biased thread. If we go by the displayed feats shown by both ninjas in Part one then Sasuke was the superior shinobi.
Ninjutsu: Naruto knew some pretty OP techniques, but really was un versatile; his summoning technique can only be used when he forces Kurama's chakra out, his Shadow clones were pathetic, only good for close ranged and very slow and his rasengan was only close ranged. Sasuke specialized in far ranged, mid ranged and close ranged combat; his chidori was a powerful close range weapon, his shurikenjutsu and weapon Jutsu was perfect for mid range and his Katon was pretty effective for far ranged combat. In other words, Sasuke part one outclassed Naruto in Ninjutsu.
Genjutsu: most likely Sasuke due to Sharingan, however I must say genjutsu was out of reach for both shinobi so we'll dismiss that department for convenience's sake.
Taijutsu: easily Sasuke. Sasuke was able to pick up on Lee's taijutsu, fight Orochimaru with pure taijutsu and defeated Yoroi with pure taijutsu. Naruto would create hundreds of clones only to be destroyed by anyone he fought in taijutsu. Sasuke easily outclassed Naruto in taijutsu, with or without the sharingan.
Intelligence: both in their own way; Sasuke is easily more observant, sharp, synthesizes information better and more intelligent, Naruto has displayed very creative strategies at times. However Naruto's strategies are usually not fully thought out and analyzed as Sasuke's; they have worked but at times it can result from luck. Sasukes intelligence was more versatile while Naruto here and there pulled some crafty tricks, it received over praise due to it not being expected from someone like Naruto.
Strength: Naruto due to Uzumaki chakra, but only slightly.
Speed: easily Sasuke, unless Naruto's in nine tailed chakra mode. Naruto in base was probably the slowest character in part one.
Stamina: easily Naruto
Skill: easily sasuke; Naruto was admitted to being the most inferior in team 7 in fundamental skills by Ebusu. Sasuke was a perfect weapon user, utilized various fighting styles to fight, and more adapt at fighting than Naruto.
While it's true Naruto could have destroyed Sasuke if he summoned Gamabunta, or went nine tailed mode etc. that's inconsistent and isn't always available. If both ninjas relied on raw skill then even without sharingan Sasuke was overall more versatile. Yeah Naruto could win due to never giving up and getting crafty near the end, but in overall ninja skill Sauke was easily ahead of Naruto in part one.