Part 1: Sasuke was always faster. Even when Naruto fought Gaara, Sasuke was still faster. This is made evident during the hospital fight.
FRS Naruto < Hebi Sasuke. This is Obvious, he blitzed team 7 without alert.
SM Naruto > MS Sasuke. Blitzing Asura path from Bunta, was way farther than Sasuke blitzing Deidara, which also failed.
KCM Naruto > EMS Sasuke. KCM Naruto was able to bar Itachi in taijutsu. Itachi showed he was better at CQC than Hebi Sasuke when they fought.
BM Naruto < EMS Sasuke (Perfect Susano'o), Sasuke/s Susano'o was keeping up with BSM Naruto, logically BM Naruto would be lower. Sasuke even reacted to Juubito who was about to hit Naruto with a fatal blow.
BSM Naruto = EMS Sasuke (Perfect Susano'o), Kishi portrayed them as equals when fighting Juubito really.
Sage Naruto < Sage Sasuke, obvious reasons, Naruto only landed a punch due to distracting Kaguya.
Sage Naruto (Enraged) > Sage Sasuke, he blitzed Kaguya while Sasuke had failed moments before.
