yeah but sasuke Chidori only goes where the arm is, where the hand is, as in straight front damage, like they said the attack is a straight thrust, that is kinda true about the Rasengan, but when you think of it might be same amount of chakra but unlike the chidori the Rasengan has i'd guess u call it splash damage when you look at the amount of damage that was done also like i said, if naruto learns to fully control the nine tails chakra Rasengan would deffently be the most powerful out of the two


but thats just my endless ramboling ^_^