Alright guys. What if hypothetically Sasuke learned Sage Mode and Naruto had the curse mark. Than Kyuubi Naruto would have no chance because the kyuubis infinity is fire. So Naruto knows fire, wind and yin yang while Sasuke just knows fire, lightning, blaze and wood element.
I say wood element because Madara tricks Sasuke into taking Hashirama cells cuz they fuse with gedo mazi and the 10 tails gets stronger.
Naruto does a 1000 shadow clones while in kyuubi mode and TBB and kills the 10 tails while Sasuke kills Madara and Kabuto and gets revenge for what he did to the Uchiha and Itachi.
Curse Mark Sasuke marries Karin, Sage Naruto marries Hinata, EMS Sasuke marries Sakura and KYuubi mode Naruto marries Tsunade.