Well in the original Naruto is stronger than sasuke. But in shippuuden it's hard to say because Sasuke has great speed and has improved his chidori but he uses his strength for hatred and vengence, that's not true power! fighting for someone you love or care about and have some point to fight for is true strength not to get revenge! That's my opinion but I love Naruto so I think he is more powerful.
NARUTO OF COURSE. HE CONTROLED THE NINE TAILS. HE MASTERD A JITSU THE FOUTH HOCKAGE COULDNT. HE DEAFEATED PAIN ALLL BY HIMSELF, EVEN KAKASHI COUDNT DEAFEAT PAIN. HE IS THE HERO OF THE LEAF. HE HAS THE WILL OF FIRE. HE WILL BECOME HOCKAGE, HE CAN EVEN DO THE FLASH STEP LIKE HIS DAD.(I DONT WANNA SAY THE OTHER PPL CUZ IT MIGHT SPOIL)