Sasuke's Rinnegan has 6 tomoe, which is not the juubi's eye, but Hagoromo's true eye.
Let's get further into this. If you haven't seen it, I'm talking about this eye.
His 6 tomoe each represent a different power.
1. Time - He can control time.
2. Space - He can change where he, or his weapon/jutsu is.
3. Dimension - He can see things on a different realm.
4. Moon - Since he's yin based, he can use a lesser version of Mugen Tsukuyomi, because he has the eyes, not body.
5. All Rinnegan powers.
6. All Sharingan, MS, and EMS powers.