On the same page as Ahmadinejad, but knows how to talk to westerners

What's the difference between Hassan Rohani and Mahmoud Ahmadinejad? Well, they've both been President of Iran, one wears a turban and the other doesn't. One has a thicker beard and glasses. Other than that, there don't seem to be any differences. Jonathan Tobin:

By demonstrating that he isn’t a cheap date but must instead be wooed
by the West with concessions, Rouhani gave us a good idea of