( Dont start hating until after youve read my reasons)
In the Naruto universe it seems that since childhood differences in strength are established.
Examples: Orochimaru>Jiraiya
Kakashi > Obito
Kakashi > Gai
Hashirama > Madara
And these differences are all displayed well into their adult years. No upgrade can change that fate as exampled by madara (upgrades to eternal mangekyo and all abilities that follow) fighting Hashirama.
So having stated that fun fact I will now say that since Sasuke has proven to be stronger than Naruto in their childhood he thus has also proven that he can and will defeat Naruto the next time they meet. Its all been fated since they were kids. No amount of upgrades (bijuu bomb, bijuu mode, sage mode, rasenshuriken, or odama rasengan) will ever be able to change that fate that Naruto has. Just like how Madara cant defeat Hashirama or Gai trying to defeat kakashi.
Guy and Kakashi are probably even. If guy opens the 8th gate, he may even be much stronger than Kakashi.
Orochimaru and Jiraiya have probably the same amount of power. Haven't seen anything that suggests otherwise.
As for the fight at the valley, that was just plot. Also, Naruto had only 1 tail, not 4.
If you disagree, tell me how would Sasuke counter Gamabunta at that time? Remember that in addition to his overwhelming strength compared to Sasuke at the time, Gamabunta has water nature jutsus which nulls any fire jutsu Sasuke has.
The weird thing about this argument is that the way you used the Kakashi/Obito and Kakashi/Gai rivalry as an example. If Kakashi really >Obito since their childhood, then that means Obito should never be in third place before Madara and Hashirama on the tier list.
You trying to implying that Kakashi can still beat Obito and everyone else except for Madara and Hashirama, while in reality Obito almost killed Kakashi by himself and his teammates. Not to mention that Obito carries a large arsenal that completely outmatched Kakashi's. Obito is >Kakashi by a large margin so large that he can't be considered even top 7.
Putting Obito and Kakashi would mean absolute death for Kakashi it's not even funny.
As for Gai and Kakashi, Kakashi has 50 wins while Gai has 50 wins. Using your argument means they should never be considered eternal rivals in the first place.
Shit changes. Naruto during Part 1 already closed the gap between him and Sasuke in the terms of power and skill. It was so damn obvious. Get with the program.
The old Neji theory of pre determine destiny doesn't work against Naruto as Neji found out in the Chunin exam. Sasuke can't mach SO6P power of Naruto. Sasuke must lose to break the cycle of death and violence created by The First and Second Sons.
( Dont start hating until after youve read my reasons)
In the Naruto universe it seems that since childhood differences in strength are established.
Examples: Orochimaru>Jiraiya
Kakashi > Obito
Kakashi > Gai
Hashirama > Madara
And these differences are all displayed well into their adult years. No upgrade can change that fate as exampled by madara (upgrades to eternal mangekyo and all abilities that follow) fighting Hashirama.
So having stated that fun fact I will now say that since Sasuke has proven to be stronger than Naruto in their childhood he thus has also proven that he can and will defeat Naruto the next time they meet. Its all been fated since they were kids. No amount of upgrades (bijuu bomb, bijuu mode, sage mode, rasenshuriken, or odama rasengan) will ever be able to change that fate that Naruto has. Just like how Madara cant defeat Hashirama or Gai trying to defeat kakashi.
Anyway would be hillarious if this were true. Sasuke barely manages to beat Naruto. Three weeks later Rock Lee challenges Sasuke again and tears him a new one just like last time.