Well Sasuke's single Rinnegan eye is special. His 3T on one eye combined with the 6T Rinnegan on his other eye add up to form the Juubi eye since 3+6=9. So by this, one can assume Sasuke has the Shinju eye split between two eyes. In essence, the Juubi eye is the originator of all Dojutsu, so technically, his one Rinnegan eye should be superior to 1 non-Tomoe Rinnegan, and maybe even 2 given his ability to use CT without a core and his eye being a hybrid between EMS and Rinnegan, rather than requiring a transition between eithr of the two dojutsu. But then again, that will be confirmed in the upcoming chapters.