Originally Posted by stubborn_narut0
Dude, the katon was C rank (r maybe even D rank) Chidori is A rank. If you read the battle you would have seen that he also spent A BIG portion of the month solely on improving his tai skills! So he only spent a fraction on directly learning chidori. Without those tai skills Chidori would be significantly less efficient.
Oh and naruto learning rasengan in one week is a very common misconception which is not true, it took him significantly more
Yes Fireball jutsu is a much weaker tech then Chidori. However their are other factors to consider. First of all he learned Fireball jutsu before
entering the academy. He was taught the handseals needed but that was all. So Sasuke had to learn how to control his chakra by himself, which would have took some time also. Also sasuke was a pussy back then. He didn't have half the motivation he had after the uchiha massacre.
So yeah chidori was harder to learn, but him having SG and an actual trainer helped speed it up. Whereas when he learned Fireball jutsu he did it all himself.
All this is irrelevant anyway. His primary chakra type is FIRE. THE END!!
PS. As for naruto's rasengan training it took him 1 day to complete the 1st step and 1 day to complete the 2nd step. I can't remember how long he tried to use them together, but I it wasn't more then a few days. So for 4-6 days he trained before he made the deal with tsunade to master it in a week. So at tops it took him 2 weeks to master that jutsu, Half the time it took sasuke. And don't think for a minute naruto learning chakra manipulation was any easier then sasuke learning Taijutsu.