Correct. Uchihas used Sharingans of fallen comrades all the time to learn the secrets of Sharingan and create Izanami and other techs. This is clearly mentioned in the stories Itachi narrates on Uchihas trying to gain EMS and the abuse of Izanagi and the creation of its pair, Izanami. Naruto wankers simply need poor excuses to validate his fox-chakra hogging. It isn't the same. It'll never be the same no matter which way anyone spins it. As one is Clan legacy and the other isn't.
CS was never a borrowed power, as Sasuke fought for his life, led Orochimaru into a trap and defeated him on the tier he had chosen for Sasuke. He was impressed and he forced it upon him; a seal which is survived through by one in ten people. Sasuke earned that power. Unlike Naruto.
The only power I would legitimately call borrowed or gifted would be the Sage's Chakra. But as Sasuke was the only person capable enough to awaken Rinnegan, it loses half of its meaning.