@ AsianReaper I can dig it. I still think sasuke would win, but ultimately that's all it'll boil down to, since there isn't conclusive evidence for either side.

Sasuke's only hope is to catch guy in genjutsu, but even still, Guy has trained himself not to be caught in sharingan genjutsu. Don't see how Sasuke can win this.

I agree that Gai's speed is just too great, as well as battle experience, experience with the sharingan, and his monstrous strength. I also see the Sasuke side and realize that he would put up a good fight. I would give this to Gai about 7-8 times out of ten or 10 out of 10. It depends on how fast he really is. Thanks for the awesome debate!

In an earlier post of mine I questioned whether Sasuke got a speed increase after getting upgrades(EMS-Rinnegan). Since A was faster than Sasuke with the MS, and the only indication of Sasuke's speed is when he was left behind by the reincarnated Hokage, Naruto said he is taking a bit longer to catch up and then later when he bisected Madara. Although the bisecting feat is impressive, but remember Madara was busy stealing and implanting Kakashi's MS. He wasn't focused on Sasuke or Naruto at that point.

Many characters have been able blindside their opponents while they were busy with something else, e.g. Asuma, Gai(base mode) in Part 1, Kakashi in Part 2 and even Sakura in Gaiden. This does not mean that they would be just as fast as some of the fastest shinobi in history(Although Gai is the exception). Therefore, just concluding that Sasuke is almost at Gai's eight gates speed is not reasonable. We can conclude that Sasuke got better predictive/perceptive abilities and other jutsu's, but not an increase in raw speed.

With all his upgrades I put Sasuke in terms of raw speed at Edo Madara level. Since Gai was faster than juubi Madara, Gai is certainly fast enough to not allow Sasuke to dodge his attacks. So it's Gai's win, although he dies afterwards.

In Boruto, Sasuke was faster than Naruto in his chakra cloak

yeah, i wonder why nobody mentioned this until now, sasuke in base is faster than KM/KSM (maybe it is SPSM?)naruto, i didnt see the whole movie therefore i wondered if the trailer of that part was canon or not, but it seems to be true :I

True as it may be, we're talking about Sasuke who fought Six Paths Madara, not the Adult!Sasuke who fought Momoshiki.

@ninja of war True, ninja's aren't at their fastest when they are busy so being blind sided isn't uncommon from slower enemies. But madara wasn't 'busy', what he was doing was rushing away from the fight to get kakashi's eye. Now it is just an assumption that he would be moving away at full speed, but it's the more likely alternative than him running from people he admitted he couldn't take it easy against not at full speed. So by default we assume he is going his full speed, and then he got blitzed by sasuke

I get your point about Madara running away, but it was more of a tactical retreat. I can also see how one can assume he would run away at full speed, but he was flying not running away and speed while flying can only be compared to Ohnoki(during his brief battle with Deidara). Despite all of this, Madara was preoccupied when he was attacked, so it cannot be said that he was at full speed at that point. Also, if Sasuke's speed is being compared to juubi Madara(which has to be taken with a huge bag of salt), even then Gai was able to land every one of his attacks on Madara. Therefore, Sasuke also would not be able to dodge with his speed alone.

Well, I never thought he would be able to dodge with speed alone, the whole point of the comparison is that he would be fast enough to have some sort of reaction, so with his massive arsenal he could pull something out