The main difference between 2011 and 2013: In 2011, there was hope that the standoff would end in a way that allows Egyptian politics to become normal. In 2013, that seems less likely.
There are times when Cairo's Tahrir Square still evokes a revolutionary spirit. But over the last year the square has largely become a bureaucratic battleground where political foot soldiers carry out the power struggle under way between the Muslim Brotherhood and the military. In the process, secular revolutionaries have been marginalized, and the glory of the revolution has fizzled.