not a Sasuke fan but you do know how different having the Sharingan and having the kyuubi is right?
The Kyuubi is a whole other being with you, giving you their power,
while the sharingan is your power.
anyway Its hard to say what would happen to either of them if they didn't have their key powers.
Their life's would be much different.
Overall, it would effect Naruto the most though, he would be accepted therefore have a much different personality, therefore not have that "try hard for your goals" ideology and wouldn't be the Naruto we know today. He'd probably be much weaker, but its hard to say. Maybe he's a natural genius like Neji or Sasuke, he's just clumsy and bad at learning things (unless plot no jutsu comes along) because of his hard life and trying to be accepted :shrug: