a resangan is a resangan same as sasuke chidori. Sasuke was exhausted while naruto was at full health and sasuke still manage or had chakra left to do chidori and counter the attack get over it
They were both at their limits.
If Naruto was at full health then he wouldn't have been unconscious at the end.
Sasuke too barely managed to walk away.
It's also a fact that Naruto wasn't trying to kill Sasuke during their final attacks while Sasuke had full intention to kill Naruto. Sasuke told Naruto that he couldn't even scratch him headband - he was mocking him.
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In the end, Naruto purposefully aims to scratch Sasuke's headband when he could have slashed Sasuke's face instead.
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In that fight, Naruto demonstrated his ability to lengthen his Kyuubi arms at will. If he
wanted to extend his reach by a few inches to attack Sasuke direct, then he could have:
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Anyways, aside from my rambling, my point:
-The Rasengan and Chidori are equal in terms of strength.
This is early in the fight where Sasuke and Naruto clash head on with the Chidori and Rasengan.
This is when they are both at full power:
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Look at page 3 of chapter 227. They both get knocked back equally.
Look at page 4 of chapter 227. Sasuke himself says he used his full powered Chidori but it could only match Naruto's Rasengan's power.