If you take away the Sharigan from Sasuke he still has plenty of techniques and he would still have a big chakra pool like Naruto. He would still have his fire jutsu, but i don't see a reason for Kakashi to train him to use chidori. he still would have learned his lightning element later but his bread and butter arsenal of chidori's would be lost to him though he could still learn Kirin.
If you take away Kurama from Naruto he would still have the large chakra pools of the Uzumaki clan that would have allowed him to use Kage Bunshin but not to such an extent as he uses it now. Both of their families would have trained them at a young age as all families in clans do. Naruto would have probably learned about his wind affinity earlier and would have had better control of his chakra.
Sasuke, if his family didn't die would have learned more about his fire affinity because Fugaku strived for his children to be the best. I do believe that Naruto would have learned rasengan and hirashin by the time he was sixteen and his mother would have taught him sealing. Nobody knows what Sasuke's mother was capable of, so the sharingan and the bijuu are there to enhance the story.