Board Thread:Versus Debates/@comment-31074250-20170318174309/@comment-35622277-20170325084201

BlazeRelease wrote: Chakra, increases your body power. Chakra can be increased by training or meditation, or in the case of the Uchihas, their chakra gets more and more powerful as they get more and more sunk in their hatred and this very hatred fuels them. want proof? During the kage summit which was one of sasuke's not so good mood times. His charka changed to a whole new level which Karin commented to be unrecognizable. And it only increased more and more till he got his EMS (Which I think he also got some presence of Itachi's chakra or something like that) And another thing battles make shinobi's much more stronger than they were before the battle. it's the ultimate training a way to get to your whole potentiel. due to the almost death moments that makes a person go with his full power or reveal his latent powers stuff like that. And sasuke's had many major battles if you didn't know. against Itachi,Killer B and at the same day with Raikage and Gaara with their own bodyguards and a group of samaurais,Danzo,kakashi and Naruto. this all made him stronger. And then he git his six paths boost which also increased his chakra and physical abilities.

While Naruto was never ever said to be fast and then all of a sudden a giant demon fox gave him super speed if that's not magical then I don't know what lol. or wait it could also be called plot. And anyways it wasn't like he ever showed that speed more than once again. So it's most likely a jutsu like the body flicker technique. Sasuke faster than base Naruto? That would make sense. Sasuke faster than SPSM Kurama Mode Naruto? Not so much. It's because Sasuke is always technically in base, while each iteration of Naruto's higher forms grant speed buffs to his base stat. He gets an overclock while Sasuke doesn't, and they essentially start from the same base clock.

Him being stated as faster when they were younger doesn't really count, as it doesn't add anything to his adult speed. At most he's faster than KCM Naruto, which is fast.

Also going by your chakra logic, Naruto would be miles faster than Sasuke in base, since he has significantly more chakra than Sasuke does. At least Naruto has an explanation for getting faster, it's not like Sasuke during those fights had really any realistic cardio training done. It's not like you can magically get faster without specifically training for it. Sasuke increasing in speed out of nowhere is more plot than Naruto's KCM speed boosts, because Naruto actually gets an in-universe explanation that makes sense.

All in all I agree with @Vladosaurus. It's just to make it look cool for the plot. The whole movie, is again, filled with plot holes and plot devices.