I think Sasuke will remind him of Izuna ...after all Sasuke and Izuna look nearly Identical .
The real question is though : How will Sasuke react if he meets Madara ?
wanna know why I ask this ? ..because in my opinion , for one : He will be concered about Tobi's identity ( beacause he will see The real Madara that he saw in Itachi's flashback Gejutsu when they fought , and he will understand that Tobi lied to him )
As for two : he will be pissed at him , because he knows that Madara was one of the reasons as to why the Uchiha were hated so much
That's just my opinion !